README
¶
strcase
Package strcase and bytcase are case-insensitive and
Unicode aware implementations of the Go standard library's
strings and bytes
packages that are accurate, fast, and never allocate memory.
Simple Unicode case-folding is used for all comparisons. This matches the behavior
of strings.EqualFold and regexp.Regexp
(when the pattern is compiled with the case-insensitive flag (?i)) and is more
accurate (and significantly more efficient) than using strings.ToLower or
strings.ToUpper to normalize the needle /
haystack before searching.
Note: The bytcase package is analogous to the strcase package; whatever applies to strcase also applies to bytcase. For simplicity, the documentation primarily refers to strcase. Unless otherwise noted, all comments apply to both packages.
Overview
- Drop-in replacement for the
stringsandbytespackages that provides Unicode aware case-insensitive matching. - Simple Unicode case-folding is used for all comparisons - making it more accurate than using strings.ToLower or strings.ToUpper for case-insensitivity.
- Any string matched by strcase or bytcase will also match with strings.EqualFold or bytes.EqualFold
- Fast and optimized for amd64 and arm64. For non-pathological inputs strcase is only 25-50% slower than the strings package.
- On average strcase/bytcase are 25x faster than using than using a case-insensitive regexp.Regexp (see the below benchmarks section).
Installation
strcase is available using the standard go get command.
Install by running:
# strcase
go get github.com/charlievieth/strcase
# bytcase
go get github.com/charlievieth/strcase/bytcase
Features
- Fast: strcase is optimized for
amd64andarm64and strives to be no worse than 2x slower than the strings package and is often only 30-50% slower.- The
IndexByte,IndexNonASCIIandCountfunctions are implemented in assembly and use SSE/AVX2 onamd64and NEON onarm64. - Instead of using the unicode package for case conversions strcase uses its own multiplicative hash tables that are roughly 10x faster (at the cost of package size).
- The
- Accurate: Unicode simple folding is used to determine equality.
- Any matched text would also match with
strings.EqualFold.
- Any matched text would also match with
- Zero allocation: none of the strcase functions allocate memory.
- Thoroughly tested and fuzzed.
Additional Features
strcase provides two functons for checking if a string contains non-ASCII characters that are highly optimized for amd64/arm64:
- strcase.IndexNonASCII: IndexNonASCII returns the index of first non-ASCII rune in s, or -1 if s consists only of ASCII characters.
- strcase.ContainsNonASCII: ContainsNonASCII returns true if s contains any non-ASCII characters.
Caveats
All invalid UTF-8 sequences are considered equal. This is because Go converts
invalid UTF-8 sequences to the Unicode replacement character 0xFFFD
(unicode.ReplacementChar /
utf8.RuneError).
This occurs both when ranging over
a string or using the utf8 package's Decode*
functions.
strcase.Compare("\xff", string(utf8.RuneError)) // returns 0
strcase.Index("a\xff", string(utf8.RuneError)) // returns 1
Thus it is the callers responsibility to ensure strcase functions are called with valid UTF-8 strings and not arbitrary binary data.
Performance
strcase aims to be seriously fast and can beat or match the performance of the strings package in some benchmarks (EqualFold and IndexRune). Overall, strcase tends to be only 30-50% slower than the strings package for non-pathological inputs.
Optimizations
- Instead of using the standard library's Unicode package, which uses a binary search for its lookup tables, strcase uses multiplicative hashing for its lookup tables. This is 10x faster at the cost of larger tables.
- Searching for runes (IndexRune) is a big determinant of the strcase packages
performance. Instead of searching for runes by their first byte (like the
strings package) strcase searches for the second byte, which is more unique,
then looks backwards/forwards to complete the match.
- NB: CL 539116 added this logic to Go's strings/bytes packages and is available starting with Go 1.23.
- Package strcase is optimized for amd64 and arm64 and includes assembly
implementations of
IndexByte,CountByteandIndexNonASCIIthat leverage the same SIMD technologies used in the standard library (SSE, AVX2, NEON). - On armv7l (Raspberry Pi), which we do not optimize for, the average performance penalty is only ~30%.
Notes:
- All invalid Unicode points and invalid multibyte UTF-8 sequences are
considered equal.
This is because the utf8 package converts
invalid runes and multibyte UTF-8 sequences to
utf8.RuneError.- This matches the behavior of strings.EqualFold.
İ(LATIN CAPITAL LETTER I WITH DOT ABOVE) andı: (LATIN SMALL LETTER DOTLESS I) doe not fold to ASCII[iI](U+0069 / U+0049)- This matches the behavior of strings.EqualFold
- See unicode.org/UCD/CaseFolding.txt for an explanation, basically this folding is normally ignored for non-Turkic languages
- Kelvin
K(U+212A) matches ASCIIKandk - Latin small letter long S
ſmatches ASCIISands
Contributing / Hacking
Contributions are welcome. Please, see the CONTRIBUTING document for details.
Benchmarks
The following benchmarks were created using internal/benchtest. Additional, processor specific benchmarks can be found in internal/benchtest/results.
regexp vs. strcase
goos: darwin
goarch: arm64
pkg: github.com/charlievieth/strcase/internal/benchtest
cpu: Apple M1 Max
│ regexp.10.txt │ strcase.10.txt │
│ sec/op │ sec/op vs base │
IndexRune-10 587.45n ± 2% 11.15n ± 1% -98.10% (p=0.000 n=10)
IndexRuneLongString-10 584.15n ± 2% 12.67n ± 1% -97.83% (p=0.000 n=10)
IndexRuneFastPath-10 673.300n ± 6% 5.130n ± 3% -99.24% (p=0.000 n=10)
Index-10 671.900n ± 2% 4.982n ± 1% -99.26% (p=0.000 n=10)
EqualFold/ASCII-10 2920.500n ± 1% 9.418n ± 2% -99.68% (p=0.000 n=10)
EqualFold/UnicodePrefix-10 3892.00n ± 1% 32.35n ± 2% -99.17% (p=0.000 n=10)
EqualFold/UnicodeSuffix-10 3885.50n ± 2% 26.17n ± 1% -99.33% (p=0.000 n=10)
IndexHard1-10 334.1µ ± 0% 340.4µ ± 0% +1.90% (p=0.000 n=10)
IndexHard2-10 9.963m ± 6% 1.362m ± 1% -86.33% (p=0.000 n=10)
IndexHard3-10 10.727m ± 0% 1.369m ± 1% -87.24% (p=0.000 n=10)
IndexHard4-10 10.385m ± 0% 1.361m ± 1% -86.89% (p=0.000 n=10)
CountHard1-10 338.1µ ± 1% 336.4µ ± 1% ~ (p=0.218 n=10)
CountHard2-10 9.844m ± 1% 1.365m ± 1% -86.13% (p=0.000 n=10)
CountHard3-10 10.684m ± 0% 1.362m ± 1% -87.25% (p=0.000 n=10)
IndexTorture-10 27787.99µ ± 1% 18.04µ ± 2% -99.94% (p=0.000 n=10)
CountTorture-10 27631.25µ ± 1% 17.86µ ± 2% -99.94% (p=0.000 n=10)
CountTortureOverlapping-10 14204.297m ± 2% 4.058m ± 1% -99.97% (p=0.000 n=10)
CountByte/10-10 570.100n ± 1% 7.684n ± 1% -98.65% (p=0.000 n=10)
CountByte/32-10 964.050n ± 2% 4.501n ± 1% -99.53% (p=0.000 n=10)
CountByte/4K-10 63123.0n ± 1% 103.1n ± 0% -99.84% (p=0.000 n=10)
CountByte/4M-10 87646.31µ ± 0% 96.02µ ± 7% -99.89% (p=0.000 n=10)
CountByte/64M-10 1433.190m ± 1% 1.574m ± 1% -99.89% (p=0.000 n=10)
IndexAnyASCII/1:1-10 742.800n ± 2% 5.513n ± 1% -99.26% (p=0.000 n=10)
IndexAnyASCII/1:2-10 915.150n ± 2% 7.462n ± 0% -99.18% (p=0.000 n=10)
IndexAnyASCII/1:4-10 1031.500n ± 7% 7.453n ± 0% -99.28% (p=0.000 n=10)
IndexAnyASCII/1:8-10 1217.000n ± 2% 7.397n ± 0% -99.39% (p=0.000 n=10)
IndexAnyASCII/1:16-10 1802.000n ± 2% 7.710n ± 1% -99.57% (p=0.000 n=10)
IndexAnyASCII/1:32-10 3100.000n ± 4% 7.711n ± 0% -99.75% (p=0.000 n=10)
IndexAnyASCII/1:64-10 5183.500n ± 2% 8.037n ± 0% -99.84% (p=0.000 n=10)
IndexAnyASCII/16:1-10 731.000n ± 4% 5.457n ± 0% -99.25% (p=0.000 n=10)
IndexAnyASCII/16:2-10 1096.00n ± 2% 13.44n ± 1% -98.77% (p=0.000 n=10)
IndexAnyASCII/16:4-10 1231.00n ± 4% 15.39n ± 3% -98.75% (p=0.000 n=10)
IndexAnyASCII/16:8-10 1429.50n ± 2% 19.38n ± 1% -98.64% (p=0.000 n=10)
IndexAnyASCII/16:16-10 2009.50n ± 3% 34.40n ± 1% -98.29% (p=0.000 n=10)
IndexAnyASCII/16:32-10 3325.00n ± 1% 61.90n ± 0% -98.14% (p=0.000 n=10)
IndexAnyASCII/16:64-10 5380.5n ± 1% 124.8n ± 3% -97.68% (p=0.000 n=10)
IndexAnyASCII/256:1-10 727.600n ± 2% 8.571n ± 3% -98.82% (p=0.000 n=10)
IndexAnyASCII/256:2-10 4038.5n ± 1% 153.7n ± 0% -96.19% (p=0.000 n=10)
IndexAnyASCII/256:4-10 4167.5n ± 1% 156.2n ± 1% -96.25% (p=0.000 n=10)
IndexAnyASCII/256:8-10 4356.0n ± 1% 161.6n ± 0% -96.29% (p=0.000 n=10)
IndexAnyASCII/256:16-10 4953.0n ± 1% 176.3n ± 3% -96.44% (p=0.000 n=10)
IndexAnyASCII/256:32-10 6819.5n ± 4% 207.5n ± 1% -96.96% (p=0.000 n=10)
IndexAnyASCII/256:64-10 8949.5n ± 6% 271.9n ± 0% -96.96% (p=0.000 n=10)
IndexAnyUTF8/1:16-10 1860.500n ± 1% 7.296n ± 0% -99.61% (p=0.000 n=10)
IndexAnyUTF8/16:16-10 2100.50n ± 1% 86.67n ± 0% -95.87% (p=0.000 n=10)
IndexAnyUTF8/256:16-10 5902.0n ± 1% 119.8n ± 1% -97.97% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic2-10 1451.35µ ± 1% 84.06µ ± 0% -94.21% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic4-10 1529.07µ ± 1% 83.80µ ± 0% -94.52% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic8-10 1349.62µ ± 18% 83.59µ ± 1% -93.81% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic16-10 1234.51µ ± 1% 64.12µ ± 1% -94.81% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic32-10 1196.96µ ± 1% 30.81µ ± 1% -97.43% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic64-10 1169.90µ ± 8% 14.68µ ± 0% -98.75% (p=0.000 n=10)
IndexByte_Bytes/10-10 4.517n ± 20%
IndexByte_Bytes/32-10 4.518n ± 1%
IndexByte_Bytes/4K-10 81.42n ± 2%
IndexByte_Bytes/4M-10 74.80µ ± 1%
IndexByte_Bytes/64M-10 1.237m ± 5%
IndexRune_Bytes/10-10 12.56n ± 1% 12.32n ± 0% -1.91% (p=0.000 n=10)
IndexRune_Bytes/32-10 12.59n ± 1% 12.32n ± 0% -2.10% (p=0.000 n=10)
IndexRune_Bytes/4K-10 85.06n ± 1% 83.56n ± 0% -1.76% (p=0.000 n=10)
IndexRune_Bytes/4M-10 65.05µ ± 1% 64.33µ ± 0% -1.11% (p=0.030 n=10)
IndexRune_Bytes/64M-10 1.149m ± 4% 1.169m ± 5% ~ (p=0.089 n=10)
IndexRuneASCII_Bytes/10-10 6.439n ± 1% 6.388n ± 0% -0.79% (p=0.025 n=10)
IndexRuneASCII_Bytes/32-10 6.462n ± 1% 6.369n ± 1% -1.43% (p=0.000 n=10)
IndexRuneASCII_Bytes/4K-10 83.87n ± 0% 83.49n ± 11% ~ (p=0.210 n=10)
IndexRuneASCII_Bytes/4M-10 75.19µ ± 2% 74.01µ ± 1% -1.57% (p=0.023 n=10)
IndexRuneASCII_Bytes/64M-10 1.256m ± 5% 1.300m ± 2% ~ (p=0.218 n=10)
IndexNonASCII_Bytes/10-10 3.063n ± 0% 2.967n ± 0% -3.13% (p=0.000 n=10)
IndexNonASCII_Bytes/32-10 3.835n ± 2% 3.759n ± 0% -1.98% (p=0.027 n=10)
IndexNonASCII_Bytes/4K-10 80.74n ± 1% 79.59n ± 0% -1.44% (p=0.016 n=10)
IndexNonASCII_Bytes/4M-10 74.47µ ± 1% 74.51µ ± 1% ~ (p=0.529 n=10)
IndexNonASCII_Bytes/64M-10 1.271m ± 4% 1.307m ± 2% ~ (p=0.089 n=10)
geomean 12.78µ 595.2n -96.26% ¹
¹ benchmark set differs from baseline; geomeans may not be comparable
│ regexp.10.txt │ strcase.10.txt │
│ B/s │ B/s vs base │
IndexRune-10 27.60Mi ± 2% 1454.81Mi ± 1% +5171.18% (p=0.000 n=10)
IndexRuneLongString-10 191.0Mi ± 2% 8802.1Mi ± 1% +4508.17% (p=0.000 n=10)
IndexRuneFastPath-10 25.50Mi ± 5% 3346.27Mi ± 3% +13024.42% (p=0.000 n=10)
Index-10 3.365Gi ± 1%
EqualFold/ASCII-10 3.920Mi ± 1% 1215.096Mi ± 2% +30900.49% (p=0.000 n=10)
EqualFold/UnicodePrefix-10 4.411Mi ± 1% 530.591Mi ± 2% +11929.51% (p=0.000 n=10)
EqualFold/UnicodeSuffix-10 4.416Mi ± 2% 656.018Mi ± 1% +14757.13% (p=0.000 n=10)
IndexHard1-10 2.869Gi ± 0%
IndexHard2-10 734.1Mi ± 1%
IndexHard3-10 730.6Mi ± 1%
IndexHard4-10 734.5Mi ± 1%
CountHard1-10 2.888Gi ± 1% 2.903Gi ± 1% ~ (p=0.218 n=10)
CountHard2-10 101.6Mi ± 1% 732.6Mi ± 1% +621.19% (p=0.000 n=10)
CountHard3-10 93.59Mi ± 0% 734.10Mi ± 1% +684.35% (p=0.000 n=10)
IndexTorture-10 325.0Mi ± 2%
CountTorture-10 214.8Ki ± 0% 336108.4Ki ± 2% +156343.18% (p=0.000 n=10)
CountTortureOverlapping-10 214.8Ki ± 5% 756987.3Ki ± 1% +352243.18% (p=0.000 n=10)
CountByte/10-10 16.73Mi ± 1% 1240.98Mi ± 1% +7318.84% (p=0.000 n=10)
CountByte/32-10 31.66Mi ± 2% 6780.62Mi ± 1% +21318.89% (p=0.000 n=10)
CountByte/4K-10 61.88Mi ± 1% 37908.26Mi ± 0% +61157.04% (p=0.000 n=10)
CountByte/4M-10 45.64Mi ± 0% 41657.45Mi ± 7% +91177.83% (p=0.000 n=10)
CountByte/64M-10 44.66Mi ± 1% 40660.56Mi ± 1% +90953.26% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic2-10 743.5Mi ± 0%
IndexPeriodic/IndexPeriodic4-10 745.8Mi ± 0%
IndexPeriodic/IndexPeriodic8-10 747.7Mi ± 1%
IndexPeriodic/IndexPeriodic16-10 974.8Mi ± 1%
IndexPeriodic/IndexPeriodic32-10 1.981Gi ± 1%
IndexPeriodic/IndexPeriodic64-10 4.159Gi ± 0%
IndexByte_Bytes/10-10 2.062Gi ± 17%
IndexByte_Bytes/32-10 6.598Gi ± 1%
IndexByte_Bytes/4K-10 46.85Gi ± 2%
IndexByte_Bytes/4M-10 52.23Gi ± 1%
IndexByte_Bytes/64M-10 50.52Gi ± 5%
IndexRune_Bytes/10-10 759.2Mi ± 1% 773.8Mi ± 0% +1.93% (p=0.000 n=10)
IndexRune_Bytes/32-10 2.367Gi ± 1% 2.418Gi ± 0% +2.17% (p=0.000 n=10)
IndexRune_Bytes/4K-10 44.85Gi ± 1% 45.65Gi ± 0% +1.79% (p=0.000 n=10)
IndexRune_Bytes/4M-10 60.05Gi ± 1% 60.72Gi ± 0% +1.12% (p=0.035 n=10)
IndexRune_Bytes/64M-10 54.38Gi ± 4% 53.46Gi ± 5% ~ (p=0.089 n=10)
IndexRuneASCII_Bytes/10-10 1.446Gi ± 1% 1.458Gi ± 0% +0.80% (p=0.023 n=10)
IndexRuneASCII_Bytes/32-10 4.612Gi ± 1% 4.679Gi ± 1% +1.46% (p=0.000 n=10)
IndexRuneASCII_Bytes/4K-10 45.48Gi ± 0% 45.69Gi ± 10% ~ (p=0.218 n=10)
IndexRuneASCII_Bytes/4M-10 51.95Gi ± 2% 52.78Gi ± 1% +1.60% (p=0.023 n=10)
IndexRuneASCII_Bytes/64M-10 49.75Gi ± 5% 48.09Gi ± 3% ~ (p=0.218 n=10)
IndexNonASCII_Bytes/10-10 3.040Gi ± 0% 3.138Gi ± 0% +3.23% (p=0.000 n=10)
IndexNonASCII_Bytes/32-10 7.772Gi ± 2% 7.928Gi ± 0% +2.01% (p=0.023 n=10)
IndexNonASCII_Bytes/4K-10 47.24Gi ± 1% 47.93Gi ± 0% +1.46% (p=0.019 n=10)
IndexNonASCII_Bytes/4M-10 52.46Gi ± 1% 52.43Gi ± 1% ~ (p=0.529 n=10)
IndexNonASCII_Bytes/64M-10 49.19Gi ± 4% 47.81Gi ± 2% ~ (p=0.089 n=10)
geomean 832.0Mi 3.764Gi +1121.52% ¹
¹ benchmark set differs from baseline; geomeans may not be comparable
│ regexp.10.txt │ strcase.10.txt │
│ B/op │ B/op vs base │
IndexRune-10 811.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=10)
IndexRuneLongString-10 811.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=10)
IndexRuneFastPath-10 791.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=10)
Index-10 791.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=10)
EqualFold/ASCII-10 4.658Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
EqualFold/UnicodePrefix-10 6.480Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
EqualFold/UnicodeSuffix-10 6.480Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexHard1-10 914.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=10)
IndexHard2-10 1.433Ki ± 4% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexHard3-10 3.665Ki ± 1% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexHard4-10 6.977Ki ± 1% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
CountHard1-10 914.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=10)
CountHard2-10 1.427Ki ± 3% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
CountHard3-10 3.668Ki ± 1% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexTorture-10 647.6Ki ± 6% 0.0Ki ± 0% -100.00% (p=0.000 n=10)
CountTorture-10 647.6Ki ± 6% 0.0Ki ± 0% -100.00% (p=0.000 n=10)
CountTortureOverlapping-10 4424.21Ki ± 0% 10.53Ki ± 1% -99.76% (p=0.000 n=10)
CountByte/10-10 765.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=10)
CountByte/32-10 1021.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=10)
CountByte/4K-10 19.36Ki ± 0% 0.00Ki ± 0% -100.00% (p=0.000 n=10)
CountByte/4M-10 27.79Mi ± 0% 0.00Mi ± 0% -100.00% (p=0.000 n=10)
CountByte/64M-10 421.2Mi ± 0% 0.0Mi ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:1-10 1.255Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:2-10 1.524Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:4-10 1.556Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:8-10 1.635Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:16-10 1.849Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:32-10 2.358Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:64-10 3.119Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:1-10 1.255Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:2-10 1.522Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:4-10 1.554Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:8-10 1.635Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:16-10 1.851Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:32-10 2.360Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:64-10 3.122Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:1-10 1.255Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:2-10 1.515Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:4-10 1.547Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:8-10 1.628Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:16-10 1.844Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:32-10 2.352Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:64-10 3.112Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyUTF8/1:16-10 1.890Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyUTF8/16:16-10 1.889Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexAnyUTF8/256:16-10 1.877Ki ± 0% 0.000Ki ± 0% -100.00% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic2-10 984.000 ± 1% 4.000 ± 0% -99.59% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic4-10 987.500 ± 1% 4.000 ± 0% -99.59% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic8-10 975.500 ± 1% 4.000 ± 0% -99.59% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic16-10 971.000 ± 1% 3.000 ± 0% -99.69% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic32-10 963.000 ± 1% 1.000 ± 0% -99.90% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic64-10 967.0 ± 1% 0.0 ± 0% -100.00% (p=0.000 n=10)
IndexByte_Bytes/10-10 0.000 ± 0%
IndexByte_Bytes/32-10 0.000 ± 0%
IndexByte_Bytes/4K-10 0.000 ± 0%
IndexByte_Bytes/4M-10 261.0 ± 1%
IndexByte_Bytes/64M-10 69.35Ki ± 5%
IndexRune_Bytes/10-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRune_Bytes/32-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRune_Bytes/4K-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRune_Bytes/4M-10 226.0 ± 1% 224.0 ± 0% -0.88% (p=0.001 n=10)
IndexRune_Bytes/64M-10 64.47Ki ± 2% 64.75Ki ± 8% ~ (p=1.000 n=10)
IndexRuneASCII_Bytes/10-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRuneASCII_Bytes/32-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRuneASCII_Bytes/4K-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRuneASCII_Bytes/4M-10 260.5 ± 2% 258.0 ± 1% -0.96% (p=0.011 n=10)
IndexRuneASCII_Bytes/64M-10 73.51Ki ± 5% 73.26Ki ± 3% ~ (p=0.896 n=10)
IndexNonASCII_Bytes/10-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexNonASCII_Bytes/32-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexNonASCII_Bytes/4K-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexNonASCII_Bytes/4M-10 258.5 ± 1% 260.0 ± 1% ~ (p=0.343 n=10)
IndexNonASCII_Bytes/64M-10 72.14Ki ± 4% 71.55Ki ± 4% ~ (p=0.305 n=10)
geomean ² ? ³ ² ⁴
¹ all samples are equal
² summaries must be >0 to compute geomean
³ benchmark set differs from baseline; geomeans may not be comparable
⁴ ratios must be >0 to compute geomean
│ regexp.10.txt │ strcase.10.txt │
│ allocs/op │ allocs/op vs base │
IndexRune-10 13.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexRuneLongString-10 13.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexRuneFastPath-10 11.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
Index-10 11.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
EqualFold/ASCII-10 71.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
EqualFold/UnicodePrefix-10 82.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
EqualFold/UnicodeSuffix-10 82.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexHard1-10 14.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexHard2-10 18.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexHard3-10 22.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexHard4-10 24.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
CountHard1-10 14.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
CountHard2-10 18.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
CountHard3-10 22.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexTorture-10 255.0 ± 47% 0.0 ± 0% -100.00% (p=0.000 n=10)
CountTorture-10 255.0 ± 47% 0.0 ± 0% -100.00% (p=0.000 n=10)
CountTortureOverlapping-10 3.141k ± 0% 0.000k ± 0% -100.00% (p=0.000 n=10)
CountByte/10-10 10.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
CountByte/32-10 12.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
CountByte/4K-10 202.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=10)
CountByte/4M-10 190.7k ± 0% 0.0k ± 0% -100.00% (p=0.000 n=10)
CountByte/64M-10 3.051M ± 0% 0.000M ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:1-10 16.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:2-10 18.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:4-10 18.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:8-10 18.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:16-10 20.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:32-10 22.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/1:64-10 22.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:1-10 16.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:2-10 18.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:4-10 18.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:8-10 18.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:16-10 20.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:32-10 22.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/16:64-10 22.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:1-10 16.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:2-10 18.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:4-10 18.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:8-10 18.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:16-10 20.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:32-10 22.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyASCII/256:64-10 22.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyUTF8/1:16-10 22.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyUTF8/16:16-10 22.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexAnyUTF8/256:16-10 22.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic2-10 12.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic4-10 12.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic8-10 12.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic16-10 12.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic32-10 12.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexPeriodic/IndexPeriodic64-10 12.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
IndexByte_Bytes/10-10 0.000 ± 0%
IndexByte_Bytes/32-10 0.000 ± 0%
IndexByte_Bytes/4K-10 0.000 ± 0%
IndexByte_Bytes/4M-10 0.000 ± 0%
IndexByte_Bytes/64M-10 0.000 ± 0%
IndexRune_Bytes/10-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRune_Bytes/32-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRune_Bytes/4K-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRune_Bytes/4M-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRune_Bytes/64M-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRuneASCII_Bytes/10-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRuneASCII_Bytes/32-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRuneASCII_Bytes/4K-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRuneASCII_Bytes/4M-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexRuneASCII_Bytes/64M-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexNonASCII_Bytes/10-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexNonASCII_Bytes/32-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexNonASCII_Bytes/4K-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexNonASCII_Bytes/4M-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
IndexNonASCII_Bytes/64M-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
geomean ² ? ³ ² ⁴
¹ all samples are equal
² summaries must be >0 to compute geomean
³ benchmark set differs from baseline; geomeans may not be comparable
⁴ ratios must be >0 to compute geomean
arm64
goos: darwin
goarch: arm64
pkg: github.com/charlievieth/strcase/internal/benchtest
│ stdlib.5.1681417522.txt │ strcase.5.1681417522.txt │
│ sec/op │ sec/op vs base │
IndexRune-10 12.11n ± 1% 11.67n ± 1% -3.59% (p=0.002 n=6)
IndexRuneLongString-10 13.44n ± 1% 13.02n ± 1% -3.12% (p=0.002 n=6)
IndexRuneFastPath-10 2.990n ± 1% 4.776n ± 1% +59.75% (p=0.002 n=6)
Index-10 3.155n ± 0% 4.729n ± 2% +49.87% (p=0.002 n=6)
LastIndex-10 3.511n ± 1% 6.615n ± 1% +88.38% (p=0.002 n=6)
IndexByte-10 2.441n ± 1% 3.572n ± 0% +46.33% (p=0.002 n=6)
EqualFold/ASCII-10 9.619n ± 1% 9.287n ± 0% -3.45% (p=0.002 n=6)
EqualFold/UnicodePrefix-10 80.37n ± 1% 32.03n ± 2% -60.14% (p=0.002 n=6)
EqualFold/UnicodeSuffix-10 73.48n ± 1% 25.54n ± 2% -65.25% (p=0.002 n=6)
IndexHard1-10 326.9µ ± 0% 331.7µ ± 0% +1.47% (p=0.002 n=6)
IndexHard2-10 327.6µ ± 0% 2165.8µ ± 1% +560.99% (p=0.002 n=6)
IndexHard3-10 357.0µ ± 1% 1854.5µ ± 3% +419.51% (p=0.002 n=6)
IndexHard4-10 1.304m ± 0% 1.348m ± 2% +3.35% (p=0.002 n=6)
LastIndexHard1-10 1.305m ± 0% 1.419m ± 1% +8.68% (p=0.002 n=6)
LastIndexHard2-10 1.305m ± 1% 1.420m ± 1% +8.76% (p=0.002 n=6)
LastIndexHard3-10 1.311m ± 4% 1.420m ± 1% +8.36% (p=0.002 n=6)
CountHard1-10 333.0µ ± 2% 335.8µ ± 1% ~ (p=0.485 n=6)
CountHard2-10 331.3µ ± 2% 2166.3µ ± 1% +553.98% (p=0.002 n=6)
CountHard3-10 357.6µ ± 1% 1851.0µ ± 1% +417.59% (p=0.002 n=6)
IndexTorture-10 9.834µ ± 3% 17.747µ ± 1% +80.48% (p=0.002 n=6)
CountTorture-10 10.09µ ± 0% 20.17µ ± 1% +99.81% (p=0.002 n=6)
CountTortureOverlapping-10 68.63µ ± 1% 4048.06µ ± 1% +5798.77% (p=0.002 n=6)
CountByte/10-10 6.731n ± 2% 7.590n ± 1% +12.76% (p=0.002 n=6)
CountByte/32-10 3.164n ± 1% 4.153n ± 1% +31.24% (p=0.002 n=6)
CountByte/4096-10 80.32n ± 0% 100.80n ± 1% +25.50% (p=0.002 n=6)
CountByte/4194304-10 82.84µ ± 2% 95.14µ ± 11% +14.84% (p=0.002 n=6)
CountByte/67108864-10 1.367m ± 2% 1.556m ± 5% +13.84% (p=0.002 n=6)
IndexAnyASCII/1:1-10 4.195n ± 1% 5.742n ± 1% +36.88% (p=0.002 n=6)
IndexAnyASCII/1:2-10 5.436n ± 0% 7.340n ± 1% +35.05% (p=0.002 n=6)
IndexAnyASCII/1:4-10 5.440n ± 0% 7.405n ± 3% +36.13% (p=0.002 n=6)
IndexAnyASCII/1:8-10 5.377n ± 1% 7.428n ± 1% +38.14% (p=0.002 n=6)
IndexAnyASCII/1:16-10 5.362n ± 1% 7.391n ± 0% +37.84% (p=0.002 n=6)
IndexAnyASCII/1:32-10 5.374n ± 0% 7.724n ± 1% +43.72% (p=0.002 n=6)
IndexAnyASCII/1:64-10 5.980n ± 1% 7.985n ± 1% +33.52% (p=0.002 n=6)
IndexAnyASCII/16:1-10 4.046n ± 2% 5.809n ± 2% +43.57% (p=0.002 n=6)
IndexAnyASCII/16:2-10 11.18n ± 1% 13.49n ± 1% +20.62% (p=0.002 n=6)
IndexAnyASCII/16:4-10 12.40n ± 0% 15.47n ± 2% +24.81% (p=0.002 n=6)
IndexAnyASCII/16:8-10 17.21n ± 1% 19.72n ± 3% +14.58% (p=0.002 n=6)
IndexAnyASCII/16:16-10 33.90n ± 0% 34.49n ± 1% +1.74% (p=0.002 n=6)
IndexAnyASCII/16:32-10 66.39n ± 0% 62.72n ± 1% -5.54% (p=0.002 n=6)
IndexAnyASCII/16:64-10 131.5n ± 0% 126.6n ± 2% -3.73% (p=0.002 n=6)
IndexAnyASCII/256:1-10 7.154n ± 0% 8.974n ± 1% +25.44% (p=0.002 n=6)
IndexAnyASCII/256:2-10 149.8n ± 0% 154.9n ± 1% +3.44% (p=0.002 n=6)
IndexAnyASCII/256:4-10 151.5n ± 1% 157.4n ± 1% +3.89% (p=0.002 n=6)
IndexAnyASCII/256:8-10 156.2n ± 0% 162.5n ± 1% +3.97% (p=0.002 n=6)
IndexAnyASCII/256:16-10 166.8n ± 0% 176.4n ± 1% +5.72% (p=0.002 n=6)
IndexAnyASCII/256:32-10 199.6n ± 0% 207.5n ± 1% +3.98% (p=0.002 n=6)
IndexAnyASCII/256:64-10 264.3n ± 0% 271.6n ± 1% +2.76% (p=0.002 n=6)
IndexAnyUTF8/1:1-10 3.105n ± 1% 3.177n ± 1% +2.32% (p=0.002 n=6)
IndexAnyUTF8/1:2-10 5.301n ± 1% 7.312n ± 0% +37.94% (p=0.002 n=6)
IndexAnyUTF8/1:4-10 5.315n ± 1% 7.340n ± 1% +38.10% (p=0.002 n=6)
IndexAnyUTF8/1:8-10 5.312n ± 1% 7.390n ± 1% +39.11% (p=0.002 n=6)
IndexAnyUTF8/1:16-10 5.331n ± 1% 7.913n ± 2% +48.45% (p=0.002 n=6)
IndexAnyUTF8/1:32-10 5.359n ± 0% 7.973n ± 1% +48.78% (p=0.002 n=6)
IndexAnyUTF8/1:64-10 5.998n ± 1% 8.233n ± 1% +37.25% (p=0.002 n=6)
IndexAnyUTF8/16:1-10 13.04n ± 0% 13.83n ± 1% +6.06% (p=0.002 n=6)
IndexAnyUTF8/16:2-10 63.08n ± 0% 35.06n ± 1% -44.42% (p=0.002 n=6)
IndexAnyUTF8/16:4-10 63.39n ± 1% 34.78n ± 0% -45.14% (p=0.002 n=6)
IndexAnyUTF8/16:8-10 63.30n ± 0% 90.81n ± 2% +43.46% (p=0.002 n=6)
IndexAnyUTF8/16:16-10 66.91n ± 2% 97.80n ± 2% +46.16% (p=0.002 n=6)
IndexAnyUTF8/16:32-10 66.80n ± 1% 97.09n ± 2% +45.34% (p=0.002 n=6)
IndexAnyUTF8/16:64-10 75.27n ± 1% 103.00n ± 1% +36.85% (p=0.002 n=6)
IndexAnyUTF8/256:1-10 168.9n ± 0% 179.2n ± 1% +6.10% (p=0.002 n=6)
IndexAnyUTF8/256:2-10 887.1n ± 1% 372.0n ± 1% -58.07% (p=0.002 n=6)
IndexAnyUTF8/256:4-10 892.0n ± 6% 201.2n ± 1% -77.44% (p=0.002 n=6)
IndexAnyUTF8/256:8-10 894.9n ± 0% 404.9n ± 1% -54.75% (p=0.002 n=6)
IndexAnyUTF8/256:16-10 940.5n ± 0% 123.3n ± 0% -86.88% (p=0.002 n=6)
IndexAnyUTF8/256:32-10 942.6n ± 2% 630.1n ± 1% -33.16% (p=0.002 n=6)
IndexAnyUTF8/256:64-10 1063.0n ± 0% 730.6n ± 2% -31.27% (p=0.002 n=6)
LastIndexAnyASCII/1:1-10 4.433n ± 1% 5.865n ± 1% +32.33% (p=0.002 n=6)
LastIndexAnyASCII/1:2-10 4.430n ± 0% 5.872n ± 1% +32.55% (p=0.002 n=6)
LastIndexAnyASCII/1:4-10 4.426n ± 1% 5.865n ± 0% +32.53% (p=0.002 n=6)
LastIndexAnyASCII/1:8-10 4.428n ± 0% 5.885n ± 2% +32.92% (p=0.002 n=6)
LastIndexAnyASCII/1:16-10 4.428n ± 0% 5.972n ± 1% +34.86% (p=0.002 n=6)
LastIndexAnyASCII/1:32-10 4.433n ± 0% 6.282n ± 3% +41.71% (p=0.002 n=6)
LastIndexAnyASCII/1:64-10 5.067n ± 1% 6.316n ± 1% +24.65% (p=0.002 n=6)
LastIndexAnyASCII/16:1-10 10.29n ± 3% 11.59n ± 1% +12.58% (p=0.002 n=6)
LastIndexAnyASCII/16:2-10 10.99n ± 0% 12.59n ± 1% +14.51% (p=0.002 n=6)
LastIndexAnyASCII/16:4-10 12.27n ± 11% 14.53n ± 1% +18.42% (p=0.002 n=6)
LastIndexAnyASCII/16:8-10 17.25n ± 1% 19.10n ± 1% +10.72% (p=0.002 n=6)
LastIndexAnyASCII/16:16-10 33.81n ± 0% 34.14n ± 1% +0.96% (p=0.002 n=6)
LastIndexAnyASCII/16:32-10 66.48n ± 0% 62.01n ± 1% -6.72% (p=0.002 n=6)
LastIndexAnyASCII/16:64-10 131.7n ± 0% 125.8n ± 1% -4.48% (p=0.002 n=6)
LastIndexAnyASCII/256:1-10 147.1n ± 0% 156.8n ± 1% +6.56% (p=0.002 n=6)
LastIndexAnyASCII/256:2-10 146.6n ± 1% 154.8n ± 1% +5.63% (p=0.002 n=6)
LastIndexAnyASCII/256:4-10 149.0n ± 0% 155.4n ± 1% +4.23% (p=0.002 n=6)
LastIndexAnyASCII/256:8-10 153.1n ± 0% 160.4n ± 1% +4.84% (p=0.002 n=6)
LastIndexAnyASCII/256:16-10 165.5n ± 0% 172.4n ± 1% +4.17% (p=0.002 n=6)
LastIndexAnyASCII/256:32-10 197.7n ± 0% 210.4n ± 1% +6.42% (p=0.002 n=6)
LastIndexAnyASCII/256:64-10 263.8n ± 0% 270.8n ± 0% +2.65% (p=0.002 n=6)
LastIndexAnyUTF8/1:1-10 4.398n ± 1% 5.692n ± 0% +29.41% (p=0.002 n=6)
LastIndexAnyUTF8/1:2-10 4.359n ± 1% 5.646n ± 0% +29.52% (p=0.002 n=6)
LastIndexAnyUTF8/1:4-10 4.364n ± 2% 5.668n ± 1% +29.89% (p=0.002 n=6)
LastIndexAnyUTF8/1:8-10 4.362n ± 1% 5.711n ± 0% +30.91% (p=0.002 n=6)
LastIndexAnyUTF8/1:16-10 4.429n ± 0% 6.025n ± 1% +36.05% (p=0.002 n=6)
LastIndexAnyUTF8/1:32-10 4.427n ± 0% 6.024n ± 0% +36.09% (p=0.002 n=6)
LastIndexAnyUTF8/1:64-10 5.060n ± 1% 6.315n ± 1% +24.80% (p=0.002 n=6)
LastIndexAnyUTF8/16:1-10 25.19n ± 1% 27.81n ± 1% +10.42% (p=0.002 n=6)
LastIndexAnyUTF8/16:2-10 74.92n ± 0% 97.78n ± 2% +30.51% (p=0.002 n=6)
LastIndexAnyUTF8/16:4-10 75.02n ± 1% 97.39n ± 1% +29.83% (p=0.002 n=6)
LastIndexAnyUTF8/16:8-10 75.01n ± 0% 97.67n ± 1% +30.21% (p=0.002 n=6)
LastIndexAnyUTF8/16:16-10 80.07n ± 0% 103.55n ± 1% +29.32% (p=0.002 n=6)
LastIndexAnyUTF8/16:32-10 80.05n ± 0% 103.60n ± 1% +29.42% (p=0.002 n=6)
LastIndexAnyUTF8/16:64-10 86.72n ± 0% 108.75n ± 1% +25.40% (p=0.002 n=6)
LastIndexAnyUTF8/256:1-10 553.9n ± 0% 556.2n ± 1% ~ (p=0.102 n=6)
LastIndexAnyUTF8/256:2-10 1.064µ ± 0% 1.393µ ± 1% +30.98% (p=0.002 n=6)
LastIndexAnyUTF8/256:4-10 1.062µ ± 0% 1.392µ ± 1% +31.01% (p=0.002 n=6)
LastIndexAnyUTF8/256:8-10 1.063µ ± 0% 1.388µ ± 1% +30.57% (p=0.002 n=6)
LastIndexAnyUTF8/256:16-10 1.144µ ± 0% 1.478µ ± 1% +29.15% (p=0.002 n=6)
LastIndexAnyUTF8/256:32-10 1.144µ ± 0% 1.483µ ± 1% +29.59% (p=0.002 n=6)
LastIndexAnyUTF8/256:64-10 1.237µ ± 0% 1.565µ ± 1% +26.52% (p=0.002 n=6)
IndexPeriodic/IndexPeriodic2-10 20.49µ ± 0% 62.58µ ± 0% +205.45% (p=0.002 n=6)
IndexPeriodic/IndexPeriodic4-10 20.52µ ± 0% 57.41µ ± 1% +179.79% (p=0.002 n=6)
IndexPeriodic/IndexPeriodic8-10 20.53µ ± 0% 54.92µ ± 0% +167.48% (p=0.002 n=6)
IndexPeriodic/IndexPeriodic16-10 55.62µ ± 1% 64.69µ ± 1% +16.31% (p=0.002 n=6)
IndexPeriodic/IndexPeriodic32-10 27.72µ ± 1% 32.38µ ± 0% +16.80% (p=0.002 n=6)
IndexPeriodic/IndexPeriodic64-10 15.21µ ± 0% 16.76µ ± 1% +10.21% (p=0.002 n=6)
IndexByte_Bytes/10-10 3.075n ± 0% 3.815n ± 0% +24.07% (p=0.002 n=6)
IndexByte_Bytes/32-10 2.844n ± 0% 3.510n ± 1% +23.44% (p=0.002 n=6)
IndexByte_Bytes/4K-10 71.52n ± 2% 80.02n ± 1% +11.90% (p=0.002 n=6)
IndexByte_Bytes/4M-10 62.95µ ± 0% 74.11µ ± 1% +17.72% (p=0.002 n=6)
IndexByte_Bytes/64M-10 1.110m ± 1% 1.211m ± 7% +9.10% (p=0.002 n=6)
IndexRune_Bytes/10-10 10.57n ± 0% 12.46n ± 1% +17.83% (p=0.002 n=6)
IndexRune_Bytes/32-10 11.81n ± 0% 12.42n ± 1% +5.21% (p=0.002 n=6)
IndexRune_Bytes/4K-10 83.05n ± 1% 85.73n ± 1% +3.22% (p=0.002 n=6)
IndexRune_Bytes/4M-10 63.88µ ± 0% 64.70µ ± 0% +1.29% (p=0.002 n=6)
IndexRune_Bytes/64M-10 1.110m ± 0% 1.152m ± 5% +3.83% (p=0.002 n=6)
IndexRuneASCII_Bytes/10-10 3.163n ± 0% 5.428n ± 0% +71.62% (p=0.002 n=6)
IndexRuneASCII_Bytes/32-10 3.166n ± 0% 5.432n ± 1% +71.57% (p=0.002 n=6)
IndexRuneASCII_Bytes/4K-10 71.84n ± 1% 83.24n ± 1% +15.88% (p=0.002 n=6)
IndexRuneASCII_Bytes/4M-10 64.09µ ± 0% 74.33µ ± 0% +15.98% (p=0.002 n=6)
IndexRuneASCII_Bytes/64M-10 1.112m ± 0% 1.245m ± 5% +11.95% (p=0.002 n=6)
IndexNonASCII_Bytes/10-10 4.673n ± 0% 3.018n ± 2% -35.41% (p=0.002 n=6)
IndexNonASCII_Bytes/32-10 11.535n ± 0% 2.872n ± 1% -75.10% (p=0.002 n=6)
IndexNonASCII_Bytes/4K-10 1287.00n ± 1% 79.36n ± 1% -93.83% (p=0.002 n=6)
IndexNonASCII_Bytes/4M-10 1323.89µ ± 0% 74.08µ ± 1% -94.40% (p=0.002 n=6)
IndexNonASCII_Bytes/64M-10 21.442m ± 1% 1.213m ± 3% -94.34% (p=0.002 n=6)
geomean 198.3n 224.5n +13.21%
│ stdlib.5.1681417522.txt │ strcase.5.1681417522.txt │
│ B/s │ B/s vs base │
CountByte/10-10 1.384Gi ± 2% 1.227Gi ± 1% -11.32% (p=0.002 n=6)
CountByte/32-10 9.418Gi ± 1% 7.176Gi ± 1% -23.81% (p=0.002 n=6)
CountByte/4096-10 47.49Gi ± 0% 37.84Gi ± 1% -20.32% (p=0.002 n=6)
CountByte/4194304-10 47.16Gi ± 2% 41.06Gi ± 10% -12.93% (p=0.002 n=6)
CountByte/67108864-10 45.72Gi ± 2% 40.16Gi ± 4% -12.16% (p=0.002 n=6)
IndexByte_Bytes/10-10 3.028Gi ± 0% 2.441Gi ± 0% -19.39% (p=0.002 n=6)
IndexByte_Bytes/32-10 10.479Gi ± 0% 8.490Gi ± 1% -18.98% (p=0.002 n=6)
IndexByte_Bytes/4K-10 53.34Gi ± 2% 47.67Gi ± 1% -10.63% (p=0.002 n=6)
IndexByte_Bytes/4M-10 62.05Gi ± 0% 52.71Gi ± 1% -15.05% (p=0.002 n=6)
IndexByte_Bytes/64M-10 56.32Gi ± 1% 51.62Gi ± 6% -8.34% (p=0.002 n=6)
IndexRune_Bytes/10-10 901.9Mi ± 0% 765.7Mi ± 1% -15.11% (p=0.002 n=6)
IndexRune_Bytes/32-10 2.525Gi ± 0% 2.400Gi ± 1% -4.96% (p=0.002 n=6)
IndexRune_Bytes/4K-10 45.93Gi ± 1% 44.50Gi ± 1% -3.12% (p=0.002 n=6)
IndexRune_Bytes/4M-10 61.15Gi ± 0% 60.37Gi ± 0% -1.27% (p=0.002 n=6)
IndexRune_Bytes/64M-10 56.31Gi ± 0% 54.24Gi ± 5% -3.68% (p=0.002 n=6)
IndexRuneASCII_Bytes/10-10 2.945Gi ± 0% 1.716Gi ± 0% -41.74% (p=0.002 n=6)
IndexRuneASCII_Bytes/32-10 9.413Gi ± 0% 5.486Gi ± 1% -41.72% (p=0.002 n=6)
IndexRuneASCII_Bytes/4K-10 53.10Gi ± 1% 45.83Gi ± 1% -13.70% (p=0.002 n=6)
IndexRuneASCII_Bytes/4M-10 60.95Gi ± 0% 52.55Gi ± 0% -13.78% (p=0.002 n=6)
IndexRuneASCII_Bytes/64M-10 56.21Gi ± 0% 50.22Gi ± 5% -10.67% (p=0.002 n=6)
IndexNonASCII_Bytes/10-10 1.993Gi ± 0% 3.086Gi ± 2% +54.86% (p=0.002 n=6)
IndexNonASCII_Bytes/32-10 2.583Gi ± 0% 10.377Gi ± 1% +301.71% (p=0.002 n=6)
IndexNonASCII_Bytes/4K-10 2.963Gi ± 1% 48.067Gi ± 1% +1521.97% (p=0.002 n=6)
IndexNonASCII_Bytes/4M-10 2.951Gi ± 0% 52.731Gi ± 1% +1687.12% (p=0.002 n=6)
IndexNonASCII_Bytes/64M-10 2.915Gi ± 1% 51.541Gi ± 3% +1668.19% (p=0.002 n=6)
geomean 12.32Gi 16.24Gi +31.83%
amd64
goos: linux
goarch: amd64
pkg: github.com/charlievieth/strcase/internal/benchtest
cpu: Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz
│ stdlib.5.1681426916.txt │ strcase.5.1681426916.txt │
│ sec/op │ sec/op vs base │
IndexRune-8 10.95n ± 1% 12.09n ± 0% +10.41% (p=0.008 n=5)
IndexRuneLongString-8 14.83n ± 0% 13.19n ± 1% -11.06% (p=0.008 n=5)
IndexRuneFastPath-8 3.726n ± 2% 6.431n ± 1% +72.60% (p=0.008 n=5)
Index-8 4.206n ± 2% 6.593n ± 0% +56.75% (p=0.008 n=5)
LastIndex-8 3.621n ± 1% 5.547n ± 0% +53.19% (p=0.008 n=5)
IndexByte-8 2.835n ± 1% 4.564n ± 1% +60.99% (p=0.008 n=5)
EqualFold/ASCII-8 8.269n ± 1% 8.777n ± 1% +6.14% (p=0.008 n=5)
EqualFold/UnicodePrefix-8 84.69n ± 0% 37.79n ± 1% -55.38% (p=0.008 n=5)
EqualFold/UnicodeSuffix-8 75.96n ± 1% 28.75n ± 1% -62.15% (p=0.008 n=5)
IndexHard1-8 79.80µ ± 1% 79.67µ ± 1% ~ (p=0.421 n=5)
IndexHard2-8 111.8µ ± 0% 2217.6µ ± 1% +1883.07% (p=0.008 n=5)
IndexHard3-8 450.1µ ± 1% 2070.0µ ± 1% +359.95% (p=0.008 n=5)
IndexHard4-8 447.3µ ± 0% 1573.6µ ± 0% +251.81% (p=0.008 n=5)
LastIndexHard1-8 1.134m ± 1% 1.580m ± 1% +39.28% (p=0.008 n=5)
LastIndexHard2-8 1.133m ± 0% 1.579m ± 2% +39.38% (p=0.008 n=5)
LastIndexHard3-8 1.130m ± 0% 1.578m ± 1% +39.60% (p=0.008 n=5)
CountHard1-8 79.66µ ± 1% 79.82µ ± 2% ~ (p=0.286 n=5)
CountHard2-8 111.8µ ± 0% 2226.7µ ± 1% +1890.99% (p=0.008 n=5)
CountHard3-8 447.7µ ± 1% 2071.9µ ± 2% +362.77% (p=0.008 n=5)
IndexTorture-8 8.706µ ± 0% 16.883µ ± 1% +93.92% (p=0.008 n=5)
CountTorture-8 8.693µ ± 1% 18.808µ ± 1% +116.36% (p=0.008 n=5)
CountTortureOverlapping-8 66.40µ ± 5% 3721.27µ ± 1% +5504.57% (p=0.008 n=5)
CountByte/10-8 3.587n ± 1% 5.299n ± 1% +47.73% (p=0.008 n=5)
CountByte/32-8 4.848n ± 0% 6.037n ± 0% +24.53% (p=0.008 n=5)
CountByte/4K-8 64.04n ± 0% 70.51n ± 1% +10.10% (p=0.008 n=5)
CountByte/4M-8 84.81µ ± 2% 91.86µ ± 3% +8.31% (p=0.008 n=5)
CountByte/64M-8 2.889m ± 8% 3.093m ± 4% ~ (p=0.056 n=5)
IndexAnyASCII/1:1-8 4.462n ± 1% 6.584n ± 1% +47.56% (p=0.008 n=5)
IndexAnyASCII/1:2-8 5.435n ± 1% 8.856n ± 0% +62.94% (p=0.008 n=5)
IndexAnyASCII/1:4-8 5.415n ± 1% 8.823n ± 0% +62.94% (p=0.008 n=5)
IndexAnyASCII/1:8-8 5.417n ± 1% 8.855n ± 0% +63.47% (p=0.008 n=5)
IndexAnyASCII/1:16-8 5.350n ± 1% 8.147n ± 0% +52.28% (p=0.008 n=5)
IndexAnyASCII/1:32-8 5.912n ± 0% 10.700n ± 21% +80.99% (p=0.008 n=5)
IndexAnyASCII/1:64-8 6.232n ± 1% 9.131n ± 40% +46.52% (p=0.008 n=5)
IndexAnyASCII/16:1-8 4.331n ± 1% 6.431n ± 4% +48.49% (p=0.008 n=5)
IndexAnyASCII/16:2-8 14.35n ± 1% 17.73n ± 4% +23.55% (p=0.008 n=5)
IndexAnyASCII/16:4-8 16.12n ± 0% 18.97n ± 3% +17.68% (p=0.008 n=5)
IndexAnyASCII/16:8-8 20.57n ± 1% 22.62n ± 0% +9.97% (p=0.008 n=5)
IndexAnyASCII/16:16-8 27.11n ± 1% 32.80n ± 1% +20.99% (p=0.008 n=5)
IndexAnyASCII/16:32-8 45.47n ± 0% 57.04n ± 1% +25.45% (p=0.008 n=5)
IndexAnyASCII/16:64-8 72.05n ± 0% 95.18n ± 1% +32.10% (p=0.008 n=5)
IndexAnyASCII/256:1-8 8.445n ± 0% 10.690n ± 0% +26.58% (p=0.008 n=5)
IndexAnyASCII/256:2-8 131.6n ± 0% 134.5n ± 2% +2.20% (p=0.008 n=5)
IndexAnyASCII/256:4-8 134.0n ± 0% 136.9n ± 1% +2.16% (p=0.008 n=5)
IndexAnyASCII/256:8-8 138.4n ± 1% 141.1n ± 0% +1.95% (p=0.008 n=5)
IndexAnyASCII/256:16-8 143.6n ± 0% 152.1n ± 0% +5.92% (p=0.008 n=5)
IndexAnyASCII/256:32-8 160.9n ± 1% 180.4n ± 1% +12.12% (p=0.008 n=5)
IndexAnyASCII/256:64-8 185.8n ± 0% 218.9n ± 1% +17.81% (p=0.008 n=5)
IndexAnyUTF8/1:1-8 3.395n ± 1% 3.643n ± 0% +7.30% (p=0.008 n=5)
IndexAnyUTF8/1:2-8 5.426n ± 0% 8.939n ± 1% +64.74% (p=0.008 n=5)
IndexAnyUTF8/1:4-8 5.400n ± 2% 8.937n ± 1% +65.50% (p=0.008 n=5)
IndexAnyUTF8/1:8-8 5.405n ± 1% 8.906n ± 0% +64.77% (p=0.008 n=5)
IndexAnyUTF8/1:16-8 5.358n ± 1% 8.068n ± 1% +50.58% (p=0.008 n=5)
IndexAnyUTF8/1:32-8 5.900n ± 0% 8.354n ± 1% +41.59% (p=0.008 n=5)
IndexAnyUTF8/1:64-8 6.243n ± 0% 8.850n ± 1% +41.76% (p=0.008 n=5)
IndexAnyUTF8/16:1-8 13.28n ± 2% 13.59n ± 8% ~ (p=0.056 n=5)
IndexAnyUTF8/16:2-8 62.27n ± 0% 33.34n ± 1% -46.46% (p=0.008 n=5)
IndexAnyUTF8/16:4-8 62.27n ± 0% 34.74n ± 1% -44.21% (p=0.008 n=5)
IndexAnyUTF8/16:8-8 62.31n ± 0% 101.40n ± 1% +62.73% (p=0.008 n=5)
IndexAnyUTF8/16:16-8 63.48n ± 0% 97.99n ± 1% +54.36% (p=0.008 n=5)
IndexAnyUTF8/16:32-8 71.60n ± 0% 103.90n ± 1% +45.11% (p=0.008 n=5)
IndexAnyUTF8/16:64-8 76.67n ± 1% 111.30n ± 2% +45.17% (p=0.008 n=5)
IndexAnyUTF8/256:1-8 170.6n ± 0% 170.3n ± 1% ~ (p=0.143 n=5)
IndexAnyUTF8/256:2-8 877.8n ± 1% 354.3n ± 0% -59.64% (p=0.008 n=5)
IndexAnyUTF8/256:4-8 874.7n ± 1% 195.6n ± 1% -77.64% (p=0.008 n=5)
IndexAnyUTF8/256:8-8 876.9n ± 0% 389.7n ± 1% -55.56% (p=0.008 n=5)
IndexAnyUTF8/256:16-8 883.6n ± 0% 121.2n ± 1% -86.28% (p=0.008 n=5)
IndexAnyUTF8/256:32-8 1006.0n ± 0% 641.4n ± 1% -36.24% (p=0.008 n=5)
IndexAnyUTF8/256:64-8 1096.0n ± 0% 757.3n ± 1% -30.90% (p=0.008 n=5)
LastIndexAnyASCII/1:1-8 4.829n ± 1% 7.173n ± 1% +48.54% (p=0.008 n=5)
LastIndexAnyASCII/1:2-8 4.814n ± 1% 7.162n ± 1% +48.77% (p=0.008 n=5)
LastIndexAnyASCII/1:4-8 4.818n ± 1% 7.167n ± 2% +48.75% (p=0.008 n=5)
LastIndexAnyASCII/1:8-8 4.809n ± 1% 7.196n ± 1% +49.64% (p=0.008 n=5)
LastIndexAnyASCII/1:16-8 4.500n ± 0% 6.571n ± 1% +46.02% (p=0.008 n=5)
LastIndexAnyASCII/1:32-8 4.900n ± 1% 6.819n ± 1% +39.16% (p=0.008 n=5)
LastIndexAnyASCII/1:64-8 5.128n ± 1% 7.309n ± 0% +42.53% (p=0.008 n=5)
LastIndexAnyASCII/16:1-8 13.82n ± 1% 16.80n ± 1% +21.56% (p=0.008 n=5)
LastIndexAnyASCII/16:2-8 14.47n ± 1% 16.98n ± 1% +17.35% (p=0.008 n=5)
LastIndexAnyASCII/16:4-8 16.30n ± 0% 18.33n ± 1% +12.45% (p=0.008 n=5)
LastIndexAnyASCII/16:8-8 21.19n ± 1% 21.97n ± 1% +3.68% (p=0.008 n=5)
LastIndexAnyASCII/16:16-8 26.91n ± 0% 33.26n ± 3% +23.60% (p=0.008 n=5)
LastIndexAnyASCII/16:32-8 44.98n ± 0% 55.87n ± 1% +24.21% (p=0.008 n=5)
LastIndexAnyASCII/16:64-8 71.95n ± 0% 93.77n ± 1% +30.33% (p=0.008 n=5)
LastIndexAnyASCII/256:1-8 130.9n ± 1% 132.5n ± 1% +1.22% (p=0.008 n=5)
LastIndexAnyASCII/256:2-8 131.8n ± 1% 133.2n ± 1% +1.06% (p=0.008 n=5)
LastIndexAnyASCII/256:4-8 134.1n ± 0% 135.6n ± 1% +1.12% (p=0.008 n=5)
LastIndexAnyASCII/256:8-8 137.8n ± 1% 139.5n ± 1% +1.23% (p=0.008 n=5)
LastIndexAnyASCII/256:16-8 143.3n ± 0% 150.2n ± 1% +4.82% (p=0.008 n=5)
LastIndexAnyASCII/256:32-8 160.1n ± 0% 178.6n ± 1% +11.56% (p=0.008 n=5)
LastIndexAnyASCII/256:64-8 185.3n ± 1% 217.3n ± 1% +17.27% (p=0.008 n=5)
LastIndexAnyUTF8/1:1-8 4.841n ± 0% 7.195n ± 1% +48.63% (p=0.008 n=5)
LastIndexAnyUTF8/1:2-8 4.842n ± 1% 7.172n ± 0% +48.12% (p=0.008 n=5)
LastIndexAnyUTF8/1:4-8 4.840n ± 0% 7.161n ± 1% +47.95% (p=0.008 n=5)
LastIndexAnyUTF8/1:8-8 4.831n ± 0% 7.157n ± 0% +48.15% (p=0.008 n=5)
LastIndexAnyUTF8/1:16-8 4.485n ± 0% 6.563n ± 1% +46.33% (p=0.008 n=5)
LastIndexAnyUTF8/1:32-8 4.896n ± 0% 6.817n ± 1% +39.24% (p=0.008 n=5)
LastIndexAnyUTF8/1:64-8 5.145n ± 0% 7.308n ± 1% +42.04% (p=0.008 n=5)
LastIndexAnyUTF8/16:1-8 30.13n ± 1% 27.98n ± 2% -7.14% (p=0.008 n=5)
LastIndexAnyUTF8/16:2-8 80.13n ± 0% 111.70n ± 1% +39.40% (p=0.008 n=5)
LastIndexAnyUTF8/16:4-8 80.12n ± 0% 112.30n ± 1% +40.16% (p=0.008 n=5)
LastIndexAnyUTF8/16:8-8 80.21n ± 0% 111.60n ± 0% +39.13% (p=0.008 n=5)
LastIndexAnyUTF8/16:16-8 81.12n ± 0% 109.20n ± 1% +34.62% (p=0.008 n=5)
LastIndexAnyUTF8/16:32-8 89.54n ± 0% 119.00n ± 1% +32.90% (p=0.008 n=5)
LastIndexAnyUTF8/16:64-8 92.18n ± 1% 130.20n ± 1% +41.25% (p=0.008 n=5)
LastIndexAnyUTF8/256:1-8 443.5n ± 1% 391.9n ± 1% -11.63% (p=0.008 n=5)
LastIndexAnyUTF8/256:2-8 1.130µ ± 0% 1.591µ ± 2% +40.80% (p=0.008 n=5)
LastIndexAnyUTF8/256:4-8 1.130µ ± 1% 1.593µ ± 1% +40.97% (p=0.008 n=5)
LastIndexAnyUTF8/256:8-8 1.129µ ± 1% 1.590µ ± 1% +40.83% (p=0.008 n=5)
LastIndexAnyUTF8/256:16-8 1.156µ ± 0% 1.582µ ± 2% +36.85% (p=0.008 n=5)
LastIndexAnyUTF8/256:32-8 1.285µ ± 1% 1.749µ ± 1% +36.11% (p=0.008 n=5)
LastIndexAnyUTF8/256:64-8 1.331µ ± 1% 1.910µ ± 1% +43.50% (p=0.008 n=5)
IndexPeriodic/IndexPeriodic2-8 5.042µ ± 0% 56.941µ ± 1% +1029.33% (p=0.008 n=5)
IndexPeriodic/IndexPeriodic4-8 5.041µ ± 1% 55.882µ ± 0% +1008.55% (p=0.008 n=5)
IndexPeriodic/IndexPeriodic8-8 58.03µ ± 1% 91.47µ ± 1% +57.62% (p=0.008 n=5)
IndexPeriodic/IndexPeriodic16-8 28.46µ ± 4% 45.73µ ± 0% +60.67% (p=0.008 n=5)
IndexPeriodic/IndexPeriodic32-8 14.74µ ± 4% 22.99µ ± 2% +56.05% (p=0.008 n=5)
IndexPeriodic/IndexPeriodic64-8 8.678µ ± 9% 12.441µ ± 4% +43.36% (p=0.008 n=5)
IndexByte_Bytes/10-8 3.037n ± 0% 3.935n ± 1% +29.57% (p=0.008 n=5)
IndexByte_Bytes/32-8 3.851n ± 1% 4.669n ± 0% +21.24% (p=0.008 n=5)
IndexByte_Bytes/4K-8 61.10n ± 0% 75.10n ± 1% +22.91% (p=0.008 n=5)
IndexByte_Bytes/4M-8 89.35µ ± 1% 95.83µ ± 4% +7.25% (p=0.008 n=5)
IndexByte_Bytes/64M-8 2.855m ± 10% 3.024m ± 6% ~ (p=0.151 n=5)
IndexRune_Bytes/10-8 10.57n ± 1% 12.59n ± 0% +19.11% (p=0.008 n=5)
IndexRune_Bytes/32-8 11.88n ± 1% 13.36n ± 1% +12.46% (p=0.008 n=5)
IndexRune_Bytes/4K-8 81.27n ± 0% 80.24n ± 1% -1.27% (p=0.008 n=5)
IndexRune_Bytes/4M-8 102.29µ ± 2% 99.42µ ± 3% ~ (p=0.310 n=5)
IndexRune_Bytes/64M-8 3.016m ± 2% 3.004m ± 3% ~ (p=0.421 n=5)
IndexRuneASCII_Bytes/10-8 3.177n ± 0% 6.011n ± 1% +89.20% (p=0.008 n=5)
IndexRuneASCII_Bytes/32-8 3.882n ± 1% 6.901n ± 1% +77.77% (p=0.008 n=5)
IndexRuneASCII_Bytes/4K-8 61.08n ± 0% 74.61n ± 0% +22.15% (p=0.008 n=5)
IndexRuneASCII_Bytes/4M-8 92.13µ ± 5% 97.13µ ± 2% +5.43% (p=0.008 n=5)
IndexRuneASCII_Bytes/64M-8 2.873m ± 2% 3.142m ± 7% +9.35% (p=0.032 n=5)
IndexNonASCII_Bytes/10-8 3.401n ± 0% 2.988n ± 1% -12.14% (p=0.008 n=5)
IndexNonASCII_Bytes/32-8 8.846n ± 1% 3.620n ± 1% -59.08% (p=0.008 n=5)
IndexNonASCII_Bytes/4K-8 895.00n ± 1% 71.40n ± 1% -92.02% (p=0.008 n=5)
IndexNonASCII_Bytes/4M-8 908.49µ ± 2% 94.63µ ± 4% -89.58% (p=0.008 n=5)
IndexNonASCII_Bytes/64M-8 15.038m ± 3% 3.094m ± 7% -79.43% (p=0.008 n=5)
geomean 188.6n 239.4n +26.96%
│ stdlib.5.1681426916.txt │ strcase.5.1681426916.txt │
│ B/s │ B/s vs base │
CountByte/10-8 2.596Gi ± 1% 1.757Gi ± 1% -32.31% (p=0.008 n=5)
CountByte/32-8 6.148Gi ± 0% 4.937Gi ± 0% -19.69% (p=0.008 n=5)
CountByte/4K-8 59.56Gi ± 0% 54.10Gi ± 1% -9.18% (p=0.008 n=5)
CountByte/4M-8 46.06Gi ± 2% 42.52Gi ± 3% -7.67% (p=0.008 n=5)
CountByte/64M-8 21.63Gi ± 8% 20.20Gi ± 4% ~ (p=0.056 n=5)
IndexByte_Bytes/10-8 3.066Gi ± 0% 2.367Gi ± 1% -22.81% (p=0.008 n=5)
IndexByte_Bytes/32-8 7.739Gi ± 1% 6.384Gi ± 0% -17.51% (p=0.008 n=5)
IndexByte_Bytes/4K-8 62.44Gi ± 0% 50.79Gi ± 1% -18.65% (p=0.008 n=5)
IndexByte_Bytes/4M-8 43.72Gi ± 1% 40.76Gi ± 3% -6.76% (p=0.008 n=5)
IndexByte_Bytes/64M-8 21.89Gi ± 9% 20.67Gi ± 6% ~ (p=0.151 n=5)
IndexRune_Bytes/10-8 902.2Mi ± 1% 757.4Mi ± 0% -16.05% (p=0.008 n=5)
IndexRune_Bytes/32-8 2.509Gi ± 1% 2.230Gi ± 1% -11.11% (p=0.008 n=5)
IndexRune_Bytes/4K-8 46.94Gi ± 0% 47.54Gi ± 1% +1.28% (p=0.008 n=5)
IndexRune_Bytes/4M-8 38.19Gi ± 2% 39.29Gi ± 3% ~ (p=0.310 n=5)
IndexRune_Bytes/64M-8 20.72Gi ± 2% 20.81Gi ± 3% ~ (p=0.421 n=5)
IndexRuneASCII_Bytes/10-8 2.931Gi ± 0% 1.549Gi ± 1% -47.14% (p=0.008 n=5)
IndexRuneASCII_Bytes/32-8 7.677Gi ± 1% 4.319Gi ± 1% -43.74% (p=0.008 n=5)
IndexRuneASCII_Bytes/4K-8 62.45Gi ± 0% 51.13Gi ± 0% -18.13% (p=0.008 n=5)
IndexRuneASCII_Bytes/4M-8 42.40Gi ± 5% 40.22Gi ± 2% -5.15% (p=0.008 n=5)
IndexRuneASCII_Bytes/64M-8 21.75Gi ± 2% 19.89Gi ± 8% -8.55% (p=0.032 n=5)
IndexNonASCII_Bytes/10-8 2.738Gi ± 0% 3.117Gi ± 1% +13.84% (p=0.008 n=5)
IndexNonASCII_Bytes/32-8 3.369Gi ± 1% 8.232Gi ± 1% +144.33% (p=0.008 n=5)
IndexNonASCII_Bytes/4K-8 4.262Gi ± 1% 53.429Gi ± 1% +1153.52% (p=0.008 n=5)
IndexNonASCII_Bytes/4M-8 4.300Gi ± 2% 41.278Gi ± 4% +860.01% (p=0.008 n=5)
IndexNonASCII_Bytes/64M-8 4.156Gi ± 3% 20.200Gi ± 7% +386.03% (p=0.008 n=5)
geomean 10.97Gi 12.85Gi +17.13%
arm (pi)
goos: linux
goarch: arm
pkg: github.com/charlievieth/strcase/internal/benchtest
│ stdlib.5.1681426807.txt │ strcase.5.1681426807.txt │
│ sec/op │ sec/op vs base │
IndexRune-4 120.0n ± 1% 112.3n ± 3% -6.46% (p=0.002 n=6)
IndexRuneLongString-4 298.4n ± 1% 286.7n ± 1% -3.94% (p=0.002 n=6)
IndexRuneFastPath-4 78.38n ± 18% 69.51n ± 3% ~ (p=0.180 n=6)
Index-4 77.23n ± 30% 71.47n ± 1% ~ (p=0.589 n=6)
LastIndex-4 22.52n ± 3% 34.44n ± 10% +52.96% (p=0.002 n=6)
IndexByte-4 49.02n ± 9% 62.13n ± 1% +26.76% (p=0.002 n=6)
EqualFold/ASCII-4 64.32n ± 1% 69.51n ± 1% +8.07% (p=0.002 n=6)
EqualFold/UnicodePrefix-4 636.3n ± 0% 234.8n ± 0% -63.09% (p=0.002 n=6)
EqualFold/UnicodeSuffix-4 585.9n ± 0% 190.6n ± 0% -67.47% (p=0.002 n=6)
IndexHard1-4 5.684m ± 1% 5.674m ± 0% -0.16% (p=0.015 n=6)
IndexHard2-4 5.715m ± 0% 9.439m ± 0% +65.15% (p=0.002 n=6)
IndexHard3-4 5.705m ± 0% 8.681m ± 2% +52.16% (p=0.002 n=6)
IndexHard4-4 5.726m ± 3% 9.271m ± 0% +61.92% (p=0.002 n=6)
LastIndexHard1-4 4.631m ± 1% 10.070m ± 1% +117.46% (p=0.002 n=6)
LastIndexHard2-4 4.667m ± 3% 10.073m ± 1% +115.86% (p=0.002 n=6)
LastIndexHard3-4 4.634m ± 3% 10.115m ± 0% +118.27% (p=0.002 n=6)
CountHard1-4 5.680m ± 0% 5.681m ± 4% ~ (p=0.699 n=6)
CountHard2-4 5.698m ± 0% 9.433m ± 0% +65.54% (p=0.002 n=6)
CountHard3-4 5.856m ± 3% 8.690m ± 5% +48.39% (p=0.002 n=6)
IndexTorture-4 43.41µ ± 1% 116.26µ ± 0% +167.81% (p=0.002 n=6)
CountTorture-4 43.44µ ± 0% 126.59µ ± 0% +191.43% (p=0.002 n=6)
CountTortureOverlapping-4 1.197m ± 1% 28.433m ± 1% +2275.73% (p=0.002 n=6)
CountByte/10-4 41.48n ± 3% 45.49n ± 3% +9.65% (p=0.002 n=6)
CountByte/32-4 70.84n ± 0% 121.95n ± 3% +72.14% (p=0.002 n=6)
CountByte/4K-4 5.543µ ± 3% 14.107µ ± 1% +154.52% (p=0.002 n=6)
CountByte/4M-4 5.782m ± 3% 14.391m ± 9% +148.87% (p=0.002 n=6)
CountByte/64M-4 125.8m ± 1% 287.1m ± 9% +128.16% (p=0.002 n=6)
IndexAnyASCII/1:1-4 68.25n ± 3% 108.35n ± 1% +58.77% (p=0.002 n=6)
IndexAnyASCII/1:2-4 57.10n ± 3% 98.97n ± 1% +73.33% (p=0.002 n=6)
IndexAnyASCII/1:4-4 60.79n ± 2% 103.20n ± 2% +69.76% (p=0.002 n=6)
IndexAnyASCII/1:8-4 65.47n ± 2% 108.40n ± 1% +65.57% (p=0.002 n=6)
IndexAnyASCII/1:16-4 92.55n ± 13% 132.75n ± 11% +43.44% (p=0.002 n=6)
IndexAnyASCII/1:32-4 114.8n ± 2% 161.9n ± 2% +41.03% (p=0.002 n=6)
IndexAnyASCII/1:64-4 167.5n ± 1% 212.1n ± 1% +26.66% (p=0.002 n=6)
IndexAnyASCII/16:1-4 71.73n ± 2% 112.80n ± 5% +57.25% (p=0.002 n=6)
IndexAnyASCII/16:2-4 101.6n ± 0% 132.7n ± 1% +30.55% (p=0.002 n=6)
IndexAnyASCII/16:4-4 110.0n ± 3% 146.6n ± 0% +33.27% (p=0.002 n=6)
IndexAnyASCII/16:8-4 128.2n ± 3% 171.8n ± 1% +34.01% (p=0.002 n=6)
IndexAnyASCII/16:16-4 165.4n ± 2% 246.4n ± 2% +48.97% (p=0.002 n=6)
IndexAnyASCII/16:32-4 259.4n ± 0% 450.6n ± 0% +73.69% (p=0.002 n=6)
IndexAnyASCII/16:64-4 411.8n ± 0% 752.1n ± 0% +82.64% (p=0.002 n=6)
IndexAnyASCII/256:1-4 473.2n ± 0% 516.0n ± 0% +9.06% (p=0.002 n=6)
IndexAnyASCII/256:2-4 917.6n ± 0% 948.1n ± 0% +3.32% (p=0.002 n=6)
IndexAnyASCII/256:4-4 924.1n ± 3% 960.1n ± 3% +3.89% (p=0.002 n=6)
IndexAnyASCII/256:8-4 942.3n ± 0% 985.9n ± 0% +4.62% (p=0.002 n=6)
IndexAnyASCII/256:16-4 982.3n ± 3% 1059.0n ± 1% +7.81% (p=0.002 n=6)
IndexAnyASCII/256:32-4 1.075µ ± 1% 1.777µ ± 3% +65.30% (p=0.002 n=6)
IndexAnyASCII/256:64-4 1.226µ ± 0% 2.076µ ± 0% +69.40% (p=0.002 n=6)
IndexAnyUTF8/1:1-4 21.38n ± 0% 18.42n ± 1% -13.87% (p=0.002 n=6)
IndexAnyUTF8/1:2-4 58.02n ± 5% 99.98n ± 1% +72.32% (p=0.002 n=6)
IndexAnyUTF8/1:4-4 60.71n ± 3% 102.95n ± 1% +69.58% (p=0.002 n=6)
IndexAnyUTF8/1:8-4 65.74n ± 3% 107.45n ± 1% +63.43% (p=0.002 n=6)
IndexAnyUTF8/1:16-4 81.01n ± 6% 122.05n ± 12% +50.66% (p=0.002 n=6)
IndexAnyUTF8/1:32-4 115.2n ± 1% 160.8n ± 1% +39.57% (p=0.002 n=6)
IndexAnyUTF8/1:64-4 167.2n ± 1% 212.3n ± 2% +27.04% (p=0.002 n=6)
IndexAnyUTF8/16:1-4 75.35n ± 13% 80.66n ± 13% ~ (p=0.310 n=6)
IndexAnyUTF8/16:2-4 571.6n ± 8% 243.7n ± 2% -57.36% (p=0.002 n=6)
IndexAnyUTF8/16:4-4 655.2n ± 6% 274.2n ± 1% -58.15% (p=0.002 n=6)
IndexAnyUTF8/16:8-4 746.5n ± 3% 1418.5n ± 2% +90.02% (p=0.002 n=6)
IndexAnyUTF8/16:16-4 922.1n ± 0% 1599.0n ± 11% +73.41% (p=0.002 n=6)
IndexAnyUTF8/16:32-4 1.570µ ± 2% 2.267µ ± 1% +44.36% (p=0.002 n=6)
IndexAnyUTF8/16:64-4 2.404µ ± 1% 3.065µ ± 1% +27.50% (p=0.002 n=6)
IndexAnyUTF8/256:1-4 882.8n ± 0% 879.2n ± 0% -0.40% (p=0.002 n=6)
IndexAnyUTF8/256:2-4 8.575µ ± 6% 1.865µ ± 1% -78.25% (p=0.002 n=6)
IndexAnyUTF8/256:4-4 9.643µ ± 5% 1.486µ ± 0% -84.59% (p=0.002 n=6)
IndexAnyUTF8/256:8-4 11.164µ ± 4% 2.926µ ± 0% -73.80% (p=0.002 n=6)
IndexAnyUTF8/256:16-4 13.915µ ± 0% 4.702µ ± 0% -66.21% (p=0.002 n=6)
IndexAnyUTF8/256:32-4 24.39µ ± 2% 14.45µ ± 3% -40.74% (p=0.002 n=6)
IndexAnyUTF8/256:64-4 37.62µ ± 1% 27.55µ ± 3% -26.78% (p=0.002 n=6)
LastIndexAnyASCII/1:1-4 69.11n ± 2% 111.15n ± 3% +60.83% (p=0.002 n=6)
LastIndexAnyASCII/1:2-4 53.51n ± 3% 94.23n ± 0% +76.10% (p=0.002 n=6)
LastIndexAnyASCII/1:4-4 56.18n ± 3% 97.55n ± 3% +73.63% (p=0.002 n=6)
LastIndexAnyASCII/1:8-4 60.98n ± 1% 102.20n ± 0% +67.58% (p=0.002 n=6)
LastIndexAnyASCII/1:16-4 72.90n ± 3% 112.95n ± 0% +54.94% (p=0.002 n=6)
LastIndexAnyASCII/1:32-4 111.6n ± 2% 153.7n ± 2% +37.72% (p=0.002 n=6)
LastIndexAnyASCII/1:64-4 163.2n ± 1% 201.8n ± 2% +23.62% (p=0.002 n=6)
LastIndexAnyASCII/16:1-4 113.8n ± 3% 142.8n ± 1% +25.53% (p=0.002 n=6)
LastIndexAnyASCII/16:2-4 119.7n ± 0% 152.5n ± 3% +27.36% (p=0.002 n=6)
LastIndexAnyASCII/16:4-4 129.2n ± 1% 165.3n ± 1% +27.95% (p=0.002 n=6)
LastIndexAnyASCII/16:8-4 151.5n ± 0% 192.8n ± 2% +27.29% (p=0.002 n=6)
LastIndexAnyASCII/16:16-4 187.7n ± 0% 265.7n ± 2% +41.56% (p=0.002 n=6)
LastIndexAnyASCII/16:32-4 278.2n ± 0% 474.2n ± 1% +70.47% (p=0.002 n=6)
LastIndexAnyASCII/16:64-4 424.4n ± 1% 775.4n ± 1% +82.70% (p=0.002 n=6)
LastIndexAnyASCII/256:1-4 996.0n ± 0% 1119.5n ± 8% +12.39% (p=0.002 n=6)
LastIndexAnyASCII/256:2-4 1.003µ ± 1% 1.041µ ± 2% +3.79% (p=0.002 n=6)
LastIndexAnyASCII/256:4-4 1.014µ ± 0% 1.049µ ± 2% +3.45% (p=0.002 n=6)
LastIndexAnyASCII/256:8-4 1.033µ ± 1% 1.073µ ± 0% +3.87% (p=0.002 n=6)
LastIndexAnyASCII/256:16-4 1.069µ ± 0% 1.150µ ± 0% +7.63% (p=0.002 n=6)
LastIndexAnyASCII/256:32-4 1.159µ ± 0% 1.871µ ± 3% +61.39% (p=0.002 n=6)
LastIndexAnyASCII/256:64-4 1.310µ ± 1% 2.174µ ± 2% +65.85% (p=0.002 n=6)
LastIndexAnyUTF8/1:1-4 69.47n ± 2% 110.90n ± 1% +59.64% (p=0.002 n=6)
LastIndexAnyUTF8/1:2-4 53.42n ± 0% 94.05n ± 2% +76.07% (p=0.002 n=6)
LastIndexAnyUTF8/1:4-4 55.72n ± 4% 96.50n ± 1% +73.19% (p=0.002 n=6)
LastIndexAnyUTF8/1:8-4 61.43n ± 2% 102.30n ± 1% +66.54% (p=0.002 n=6)
LastIndexAnyUTF8/1:16-4 72.81n ± 0% 113.95n ± 6% +56.50% (p=0.002 n=6)
LastIndexAnyUTF8/1:32-4 111.6n ± 0% 155.5n ± 3% +39.44% (p=0.002 n=6)
LastIndexAnyUTF8/1:64-4 163.5n ± 1% 203.1n ± 2% +24.18% (p=0.002 n=6)
LastIndexAnyUTF8/16:1-4 212.7n ± 0% 246.6n ± 8% +15.96% (p=0.002 n=6)
LastIndexAnyUTF8/16:2-4 685.7n ± 3% 1366.5n ± 6% +99.29% (p=0.002 n=6)
LastIndexAnyUTF8/16:4-4 728.8n ± 2% 1431.0n ± 2% +96.36% (p=0.002 n=6)
LastIndexAnyUTF8/16:8-4 813.9n ± 2% 1504.5n ± 4% +84.86% (p=0.002 n=6)
LastIndexAnyUTF8/16:16-4 1.192µ ± 7% 1.734µ ± 2% +45.47% (p=0.002 n=6)
LastIndexAnyUTF8/16:32-4 1.669µ ± 2% 2.391µ ± 3% +43.26% (p=0.002 n=6)
LastIndexAnyUTF8/16:64-4 2.491µ ± 2% 3.198µ ± 1% +28.38% (p=0.002 n=6)
LastIndexAnyUTF8/256:1-4 2.526µ ± 0% 2.593µ ± 1% +2.63% (p=0.002 n=6)
LastIndexAnyUTF8/256:2-4 10.14µ ± 4% 20.74µ ± 2% +104.44% (p=0.002 n=6)
LastIndexAnyUTF8/256:4-4 10.84µ ± 1% 21.42µ ± 1% +97.56% (p=0.002 n=6)
LastIndexAnyUTF8/256:8-4 12.21µ ± 3% 22.76µ ± 5% +86.46% (p=0.002 n=6)
LastIndexAnyUTF8/256:16-4 16.35µ ± 19% 25.97µ ± 7% +58.83% (p=0.002 n=6)
LastIndexAnyUTF8/256:32-4 25.82µ ± 1% 38.08µ ± 10% +47.51% (p=0.002 n=6)
LastIndexAnyUTF8/256:64-4 39.09µ ± 2% 50.23µ ± 9% +28.50% (p=0.002 n=6)
IndexPeriodic/IndexPeriodic2-4 351.4µ ± 0% 336.9µ ± 16% ~ (p=0.394 n=6)
IndexPeriodic/IndexPeriodic4-4 351.4µ ± 1% 336.8µ ± 13% ~ (p=0.065 n=6)
IndexPeriodic/IndexPeriodic8-4 351.2µ ± 1% 492.1µ ± 0% +40.13% (p=0.002 n=6)
IndexPeriodic/IndexPeriodic16-4 167.9µ ± 0% 334.8µ ± 1% +99.44% (p=0.002 n=6)
IndexPeriodic/IndexPeriodic32-4 166.1µ ± 1% 291.5µ ± 1% +75.51% (p=0.002 n=6)
IndexPeriodic/IndexPeriodic64-4 132.6µ ± 0% 234.8µ ± 3% +77.02% (p=0.002 n=6)
IndexByte_Bytes/10-4 40.12n ± 3% 43.35n ± 3% +8.06% (p=0.002 n=6)
IndexByte_Bytes/32-4 89.12n ± 2% 117.65n ± 2% +32.01% (p=0.002 n=6)
IndexByte_Bytes/4K-4 6.342µ ± 5% 11.323µ ± 4% +78.54% (p=0.002 n=6)
IndexByte_Bytes/4M-4 6.742m ± 1% 11.580m ± 7% +71.75% (p=0.002 n=6)
IndexByte_Bytes/64M-4 126.9m ± 2% 212.5m ± 4% +67.49% (p=0.002 n=6)
IndexRune_Bytes/10-4 110.8n ± 1% 121.7n ± 2% +9.84% (p=0.002 n=6)
IndexRune_Bytes/32-4 159.9n ± 2% 171.5n ± 4% +7.26% (p=0.002 n=6)
IndexRune_Bytes/4K-4 6.685µ ± 1% 6.764µ ± 6% +1.19% (p=0.004 n=6)
IndexRune_Bytes/4M-4 6.760m ± 0% 6.806m ± 1% ~ (p=0.065 n=6)
IndexRune_Bytes/64M-4 128.1m ± 2% 130.6m ± 11% ~ (p=0.589 n=6)
IndexRuneASCII_Bytes/10-4 43.45n ± 1% 57.01n ± 7% +31.21% (p=0.002 n=6)
IndexRuneASCII_Bytes/32-4 92.28n ± 6% 130.85n ± 8% +41.79% (p=0.002 n=6)
IndexRuneASCII_Bytes/4K-4 6.613µ ± 0% 11.271µ ± 2% +70.45% (p=0.002 n=6)
IndexRuneASCII_Bytes/4M-4 6.751m ± 0% 11.502m ± 2% +70.38% (p=0.002 n=6)
IndexRuneASCII_Bytes/64M-4 129.2m ± 55% 208.2m ± 54% +61.16% (p=0.002 n=6)
IndexNonASCII_Bytes/10-4 24.71n ± 3% 26.28n ± 5% +6.35% (p=0.002 n=6)
IndexNonASCII_Bytes/32-4 78.75n ± 4% 75.23n ± 2% -4.47% (p=0.009 n=6)
IndexNonASCII_Bytes/4K-4 8.235µ ± 0% 8.874µ ± 7% +7.77% (p=0.002 n=6)
IndexNonASCII_Bytes/4M-4 8.449m ± 3% 9.721m ± 3% +15.05% (p=0.002 n=6)
IndexNonASCII_Bytes/64M-4 154.2m ± 2% 170.5m ± 15% +10.58% (p=0.002 n=6)
geomean 2.636µ 3.464µ +31.41%
│ stdlib.5.1681426807.txt │ strcase.5.1681426807.txt │
│ B/s │ B/s vs base │
CountByte/10-4 229.9Mi ± 3% 209.7Mi ± 3% -8.80% (p=0.002 n=6)
CountByte/32-4 430.8Mi ± 0% 250.2Mi ± 3% -41.91% (p=0.002 n=6)
CountByte/4K-4 704.7Mi ± 3% 276.9Mi ± 1% -60.71% (p=0.002 n=6)
CountByte/4M-4 691.8Mi ± 3% 278.0Mi ± 10% -59.82% (p=0.002 n=6)
CountByte/64M-4 508.7Mi ± 1% 222.9Mi ± 10% -56.17% (p=0.002 n=6)
IndexByte_Bytes/10-4 237.7Mi ± 3% 220.0Mi ± 3% -7.47% (p=0.002 n=6)
IndexByte_Bytes/32-4 342.5Mi ± 2% 259.4Mi ± 2% -24.26% (p=0.002 n=6)
IndexByte_Bytes/4K-4 616.9Mi ± 4% 345.0Mi ± 4% -44.08% (p=0.002 n=6)
IndexByte_Bytes/4M-4 593.3Mi ± 1% 345.4Mi ± 7% -41.78% (p=0.002 n=6)
IndexByte_Bytes/64M-4 504.5Mi ± 2% 301.2Mi ± 4% -40.29% (p=0.002 n=6)
IndexRune_Bytes/10-4 86.10Mi ± 1% 78.39Mi ± 2% -8.96% (p=0.002 n=6)
IndexRune_Bytes/32-4 191.0Mi ± 2% 178.0Mi ± 4% -6.77% (p=0.002 n=6)
IndexRune_Bytes/4K-4 584.4Mi ± 1% 577.5Mi ± 5% -1.17% (p=0.004 n=6)
IndexRune_Bytes/4M-4 591.7Mi ± 0% 587.8Mi ± 1% ~ (p=0.065 n=6)
IndexRune_Bytes/64M-4 499.6Mi ± 2% 490.2Mi ± 10% ~ (p=0.589 n=6)
IndexRuneASCII_Bytes/10-4 219.5Mi ± 1% 167.3Mi ± 7% -23.79% (p=0.002 n=6)
IndexRuneASCII_Bytes/32-4 330.7Mi ± 6% 233.2Mi ± 7% -29.47% (p=0.002 n=6)
IndexRuneASCII_Bytes/4K-4 590.8Mi ± 0% 346.6Mi ± 2% -41.33% (p=0.002 n=6)
IndexRuneASCII_Bytes/4M-4 592.5Mi ± 0% 347.8Mi ± 2% -41.30% (p=0.002 n=6)
IndexRuneASCII_Bytes/64M-4 495.4Mi ± 35% 307.4Mi ± 35% -37.96% (p=0.002 n=6)
IndexNonASCII_Bytes/10-4 385.9Mi ± 3% 362.8Mi ± 5% -5.99% (p=0.002 n=6)
IndexNonASCII_Bytes/32-4 387.5Mi ± 4% 405.7Mi ± 2% +4.68% (p=0.009 n=6)
IndexNonASCII_Bytes/4K-4 474.4Mi ± 0% 440.2Mi ± 7% -7.21% (p=0.002 n=6)
IndexNonASCII_Bytes/4M-4 473.4Mi ± 3% 411.5Mi ± 3% -13.08% (p=0.002 n=6)
IndexNonASCII_Bytes/64M-4 415.1Mi ± 2% 375.5Mi ± 13% -9.54% (p=0.002 n=6)
geomean 407.9Mi 296.3Mi -27.37%
Documentation
¶
Overview ¶
Package strcase is a case-insensitive and Unicode aware implementation of the Go standard library's strings package that is fast, accurate, and never allocates memory.
Simple Unicode case-folding is used for all comparisons. This matches the behavior of strings.EqualFold.
Package strcase also provides two functions for identifying non-ASCII characters that are not available in the strings package: IndexNonASCII and ContainsNonASCII. On amd64 and arm64 these functions are implemented in assembly and their performance is mostly governed by memory bandwidth.
Index ¶
- Constants
- func Compare(s, t string) int
- func Contains(s, substr string) bool
- func ContainsAny(s, chars string) bool
- func ContainsNonASCII(s string) bool
- func ContainsRune(s string, r rune) bool
- func Count(s, substr string) int
- func Cut(s, sep string) (before, after string, found bool)
- func CutPrefix(s, prefix string) (after string, found bool)
- func CutSuffix(s, suffix string) (before string, found bool)
- func EqualFold(s, t string) bool
- func HasPrefix(s, prefix string) bool
- func HasSuffix(s, suffix string) bool
- func Index(s, substr string) int
- func IndexAny(s, chars string) int
- func IndexByte(s string, c byte) int
- func IndexByteASCII(s string, c byte) int
- func IndexNonASCII(s string) int
- func IndexRune(s string, r rune) int
- func LastIndex(s, substr string) int
- func LastIndexAny(s, chars string) int
- func LastIndexByte(s string, c byte) int
- func TrimPrefix(s, prefix string) string
- func TrimSuffix(s, suffix string) string
- Bugs
Examples ¶
Constants ¶
View Source
const UnicodeVersion = tables.UnicodeVersion
Variables ¶
This section is empty.
Functions ¶
func Compare ¶
Compare returns an integer comparing two strings lexicographically ignoring case. The result will be 0 if a == b, -1 if a < b, and +1 if a > b.
Example ¶
package main
import (
"fmt"
"unicode/utf8"
"github.com/charlievieth/strcase"
)
func main() {
// ASCII
fmt.Println(strcase.Compare("A", "b"))
fmt.Println(strcase.Compare("A", "a"))
fmt.Println(strcase.Compare("B", "a"))
// Unicode
fmt.Println(strcase.Compare("s", "ſ"))
fmt.Println(strcase.Compare("αβδ", "ΑΒΔ"))
// All invalid UTF-8 sequences are considered equal
fmt.Println(strcase.Compare("\xff", string(utf8.RuneError)))
}
Output: -1 0 1 0 0 0
Example (Find) ¶
Using strcase.Compare and sort.Find to search a string slice.
package main
import (
"fmt"
"sort"
"github.com/charlievieth/strcase"
)
func main() {
a := []string{
"a",
"b",
"α",
}
for _, s := range []string{"A", "B", "Z"} {
i, found := sort.Find(len(a), func(i int) int {
return strcase.Compare(s, a[i])
})
if found {
fmt.Printf("%q found at index %d\n", s, i)
} else {
fmt.Printf("%q not found", s)
}
}
}
Output: "A" found at index 0 "B" found at index 1 "Z" not found
Example (Search) ¶
Case insensitive search using strcase.Compare.
package main
import (
"fmt"
"sort"
"github.com/charlievieth/strcase"
)
func main() {
a := []string{
"a",
"b",
"α",
}
s := "B" // string being searched for
i := sort.Search(len(a), func(i int) bool {
return strcase.Compare(a[i], s) >= 0
})
fmt.Printf("%d: %q\n", i, a[i])
}
Output: 1: "b"
Example (Sort) ¶
Case insensitive sort using strcase.Compare.
package main
import (
"fmt"
"sort"
"github.com/charlievieth/strcase"
)
func main() {
a := []string{
"b",
"a",
"α",
"B",
"Α", // U+0391
"A",
}
sort.SliceStable(a, func(i, j int) bool {
return strcase.Compare(a[i], a[j]) < 0
})
fmt.Printf("%q\n", a)
}
Output: ["a" "A" "b" "B" "α" "Α"]
func Contains ¶
Contains reports whether substr is within s.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.Contains("SeaFood", "foo"))
fmt.Println(strcase.Contains("SeaFood", "bar"))
fmt.Println(strcase.Contains("SeaFood", ""))
fmt.Println(strcase.Contains("", ""))
fmt.Println(strcase.Contains("ΑΔΕΛΦΟΣΎΝΗΣ", "αδελφοσύνης"))
// All invalid UTF-8 sequences are considered equal
fmt.Println(strcase.Contains("\xed\xa0\x80\x80", "\xed\xbf\xbf\x80"))
}
Output: true false true true true true
Example (Invalid) ¶
package main
import (
"fmt"
"unicode/utf8"
"github.com/charlievieth/strcase"
)
func main() {
// All invalid UTF-8 sequences are considered equal
fmt.Println(strcase.Contains("a\xff", string(utf8.RuneError)))
fmt.Println(strcase.Contains("abc\xed\xa0\x80\x80", "\xed\xbf\xbf\x80"))
}
Output: true true
func ContainsAny ¶
ContainsAny reports whether any Unicode code points in chars are within s.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.ContainsAny("team", "I"))
fmt.Println(strcase.ContainsAny("fail", "UI"))
fmt.Println(strcase.ContainsAny("ure", "UI"))
fmt.Println(strcase.ContainsAny("failure", "UI"))
fmt.Println(strcase.ContainsAny("foo", ""))
fmt.Println(strcase.ContainsAny("", ""))
fmt.Println(strcase.ContainsAny("αβδ", "Α"))
}
Output: false true true true false false true
func ContainsNonASCII ¶
ContainsNonASCII returns true if s contains any non-ASCII characters.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.ContainsNonASCII("日a本b語ç日"))
fmt.Println(strcase.ContainsNonASCII("abc語"))
fmt.Println(strcase.ContainsNonASCII("abc"))
}
Output: true true false
func ContainsRune ¶
ContainsRune reports whether the Unicode code point r is within s.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
// Finds whether a string contains a particular Unicode code point.
fmt.Println(strcase.ContainsRune("aardvark", 'A'))
fmt.Println(strcase.ContainsRune("timeout", 'A'))
}
Output: true false
func Count ¶
Count counts the number of non-overlapping instances of substr in s. If substr is an empty string, Count returns 1 + the number of Unicode code points in s.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.Count("cheese", "e"))
fmt.Println(strcase.Count("five", ""))
fmt.Println(strcase.Count("ΑΒΔ", "α"))
fmt.Println(strcase.Count("ΑΒΔ", ""))
}
Output: 3 5 1 4
func Cut ¶
Cut slices s around the first instance of sep, returning the text before and after sep. The found result reports whether sep appears in s. If sep does not appear in s, cut returns s, "", false.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
show := func(s, sep string) {
before, after, found := strcase.Cut(s, sep)
fmt.Printf("Cut(%q, %q) = %q, %q, %v\n", s, sep, before, after, found)
}
show("Gopher", "GO")
show("Gopher", "Ph")
show("Gopher", "Er")
show("Gopher", "Badger")
show("123 αβδ 456", "ΑΒΔ")
}
Output: Cut("Gopher", "GO") = "", "pher", true Cut("Gopher", "Ph") = "Go", "er", true Cut("Gopher", "Er") = "Goph", "", true Cut("Gopher", "Badger") = "Gopher", "", false Cut("123 αβδ 456", "ΑΒΔ") = "123 ", " 456", true
func CutPrefix ¶
CutPrefix returns s without the provided leading prefix string and reports whether it found the prefix. If s doesn't start with prefix, CutPrefix returns s, false. If prefix is the empty string, CutPrefix returns s, true.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
show := func(s, sep string) {
after, found := strcase.CutPrefix(s, sep)
fmt.Printf("CutPrefix(%q, %q) = %q, %v\n", s, sep, after, found)
}
show("Gopher", "Go")
show("Gopher", "Ph")
}
Output: CutPrefix("Gopher", "Go") = "pher", true CutPrefix("Gopher", "Ph") = "Gopher", false
func CutSuffix ¶
CutSuffix returns s without theI provided ending suffix string and reports whether it found the suffix. If s doesn't end with suffix, CutSuffix returns s, false. If suffix is the empty string, CutSuffix returns s, true.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
show := func(s, sep string) {
before, found := strcase.CutSuffix(s, sep)
fmt.Printf("CutSuffix(%q, %q) = %q, %v\n", s, sep, before, found)
}
show("Gopher", "Go")
show("Gopher", "Er")
}
Output: CutSuffix("Gopher", "Go") = "Gopher", false CutSuffix("Gopher", "Er") = "Goph", true
func EqualFold ¶
EqualFold reports whether s and t, interpreted as UTF-8 strings, are equal under simple Unicode case-folding, which is a more general form of case-insensitivity.
EqualFold is included for symmetry with the strings package and because our implementation is usually 2x faster than strings.EqualFold.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.EqualFold("Go", "go"))
// true because comparison uses simple case-folding
fmt.Println(strcase.EqualFold("AB", "ab"))
// false because comparison does not use full case-folding
fmt.Println(strcase.EqualFold("ß", "ss"))
}
Output: true true false
func HasPrefix ¶
HasPrefix tests whether the string s begins with prefix ignoring case.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.HasPrefix("Gopher", "go"))
fmt.Println(strcase.HasPrefix("Gopher", "c"))
fmt.Println(strcase.HasPrefix("Gopher", ""))
// Moonlight Night (Mayakovsky) - 1916
fmt.Println(strcase.HasPrefix("А вот и полная повисла в воздухе.", "А ВОТ"))
}
Output: true false true true
func HasSuffix ¶
HasSuffix tests whether the string s ends with suffix.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.HasSuffix("Amigo", "GO"))
fmt.Println(strcase.HasSuffix("Amigo", "AMI"))
fmt.Println(strcase.HasSuffix("Amigo", ""))
// Moonlight Night (Mayakovsky) - 1916
fmt.Println(strcase.HasSuffix("А вот и полная повисла в воздухе.", "В Воздухе."))
}
Output: true false true true
func Index ¶
Index returns the index of the first instance of substr in s, or -1 if substr is not present in s. Both s and substr are interpreted as UTF-8 strings and simple Unicode case-folding is used to check for equality. All invalid UTF-8 encoded runes are considered equal - this matches the behavior of strings.EqualFold.
If substr is a single byte and an invalid UTF-8 sequence (0x80-0xFF) the index of the first invalid rune is returned. This matches the behavior of IndexRune, but does not match the behavior of IndexByte, which will return the index of bytes in the range of 0x80-0xFF. This is required because we guarantee that the result of Index would equal if compared with strings.EqualFold.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.Index("chicken", "KEN"))
fmt.Println(strcase.Index("chicken", "DMR"))
fmt.Println(strcase.Index("日a本b語ç日ð本ê語", "Ç日Ð本Ê"))
}
Output: 4 -1 11
Example (Invalid) ¶
package main
import (
"fmt"
"unicode/utf8"
"github.com/charlievieth/strcase"
)
func main() {
// All invalid UTF-8 sequences are considered equal
fmt.Println(strcase.Index("a\xff", string(utf8.RuneError)))
fmt.Println(strcase.Index("abc\xed\xa0\x80\x80", "\xed\xbf\xbf\x80"))
}
Output: 1 3
func IndexAny ¶
IndexAny returns the index of the first instance of any Unicode code point from chars in s, or -1 if no Unicode code point from chars is present in s.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.IndexAny("chicken", "AEIOUY"))
fmt.Println(strcase.IndexAny("crwth", "AEIOUY"))
// Kelvin K (U+212A) matches ASCII 'K' and 'k'
fmt.Println(strcase.IndexAny("45K", "k"))
// Latin small letter long S 'ſ' matches ASCII 'S' and 's'
fmt.Println(strcase.IndexAny("salsa", "ſ"))
}
Output: 2 -1 2 0
func IndexByte ¶
IndexByte returns the index of the first instance of c (ignoring case) in s, or -1 if c is not present in s. Matching is case-insensitive and Unicode simple folding is used which means that ASCII bytes 'K' and 'k' match Kelvin 'K', and ASCII bytes 'S' and 's' match 'ſ' (Latin small letter long S). Therefore, string s may be scanned twice when c is in [KkSs] (because the optimized assembly is ASCII only).
On amd64 and arm64 this is only ~20-25% slower than strings.IndexByte for small strings (<4M) and ~6% slower for larger strings. The slowdown for small strings is due to additional checks and function call overheard.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.IndexByte("golang", 'G'))
fmt.Println(strcase.IndexByte("gophers", 'H'))
fmt.Println(strcase.IndexByte("golang", 'X'))
// Latin small letter long S 'ſ' matches ASCII 'S' and 's'
fmt.Println(strcase.IndexByte("ſinfulneſs", 's'))
// K
Output:
func IndexByteASCII ¶ added in v0.0.4
IndexByte returns the index of the first instance of c (ignoring case) in s, or -1 if c is not present in s. Case matching is ASCII only, unlike IndexByte which is Unicode aware.
func IndexNonASCII ¶
IndexNonASCII returns the index of first non-ASCII rune in s, or -1 if s consists only of ASCII characters.
On arm64 and amd64, IndexNonASCII is an order of magnitude faster than using a for loop and checking each byte of s and should be close to that of strings.IndexByte (54GBi/s on arm64).
IndexNonASCII is up to 17 times faster on arm64 and 12 times faster on amd64 compared to using a for loop and checking each byte of s.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.IndexNonASCII("日a本b語ç日"))
fmt.Println(strcase.IndexNonASCII("abc語"))
fmt.Println(strcase.IndexNonASCII("abc"))
}
Output: 0 3 -1
func IndexRune ¶
IndexRune returns the index of the first instance of the Unicode code point r, or -1 if rune is not present in s. If r is utf8.RuneError, it returns the first instance of any invalid UTF-8 byte sequence.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.IndexRune("chicken", 'K'))
// U+212A is the code point for Kelvin K
fmt.Println(strcase.IndexRune("chicken", '\u212A'))
fmt.Println(strcase.IndexRune("chicken", 'D'))
fmt.Println(strcase.IndexRune("日a本b語ç日", 'Ç'))
}
Output: 4 4 -1 11
func LastIndex ¶
LastIndex returns the index of the last instance of substr in s, or -1 if substr is not present in s.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.Index("go gopher", "GO"))
fmt.Println(strcase.LastIndex("go gopher", "GO"))
fmt.Println(strcase.LastIndex("go gopher", "rodent"))
// Moonlight Night (Mayakovsky) - 1916
fmt.Println(strcase.LastIndex("А вот и полная повисла в воздухе.", "ПОЛНАЯ"))
}
Output: 0 3 -1 13
func LastIndexAny ¶
LastIndexAny returns the index of the last instance of any Unicode code point from chars in s, or -1 if no Unicode code point from chars is present in s.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.LastIndexAny("go gopher", "GO"))
fmt.Println(strcase.LastIndexAny("go gopher", "RODENT"))
fmt.Println(strcase.LastIndexAny("go gopher", "FAIL"))
fmt.Println(strcase.LastIndexAny("Картѣ", "РТ" /* U+0420 & U+0422 */))
}
Output: 4 8 -1 6
func LastIndexByte ¶
LastIndexByte returns the index of the last instance of c in s, or -1 if c is not present in s.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
fmt.Println(strcase.LastIndexByte("Hello, world", 'L'))
fmt.Println(strcase.LastIndexByte("Hello, world", 'O'))
// Kelvin K (U+212A) matches ASCII 'K' and 'k'
fmt.Println(strcase.LastIndexByte("Hello, \u212Aelvin", 'k'))
}
Output: 10 8 7
func TrimPrefix ¶
TrimPrefix returns s without the provided leading prefix string. If s doesn't start with prefix, s is returned unchanged.
Example ¶
package main
import (
"fmt"
"github.com/charlievieth/strcase"
)
func main() {
var s = "¡¡¡Hello, Gophers!!!"
s = strcase.TrimPrefix(s, "¡¡¡HELLO, ")
s = strcase.TrimPrefix(s, "¡¡¡HOWDY, ")
fmt.Println(s)
// All invalid code points are considered equal. Therefore the
// behavior of TrimPrefix is unpredictable if the string contains
// invalid UTF-8-encoded runes.
//
// This also applies to TrimSuffix, Cut, CutPrefix, and CutSuffix.
fmt.Println(strcase.TrimPrefix("\xed\xa0\x80\x80foo", "\xed\xbf\xbf\x80"))
}
Output: Gophers!!! foo
func TrimSuffix ¶
TrimSuffix returns s without the provided trailing suffix string. If s doesn't end with suffix, s is returned unchanged.
Types ¶
This section is empty.
Notes ¶
Bugs ¶
There is no mechanism for full case folding, that is, for characters that involve multiple runes in the input or output (see: https://pkg.go.dev/unicode#pkg-note-BUG).
This is a limitation of Go's unicode package.
Source Files
Directories
¶
| Path | Synopsis |
|---|---|
|
Package bytcase is a case-insensitive and Unicode aware implementation of the Go standard library's bytes package that is fast, accurate, and never allocates memory.
|
Package bytcase is a case-insensitive and Unicode aware implementation of the Go standard library's bytes package that is fast, accurate, and never allocates memory. |
|
internal
|
|
|
benchtest
Package benchtest is used for benchmarking strcase against the Go stdlib's strings package.
|
Package benchtest is used for benchmarking strcase against the Go stdlib's strings package. |
|
gen
Module
|
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