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bombardier is a HTTP(S) benchmarking tool. It is written in Go programming language and uses excellent fasthttp instead of Go's default http library, because of its lightning fast performance.

With bombardier v1.1 and higher you can now use net/http client if you need to test HTTP/2.x services or want to use a more RFC-compliant HTTP client.

Tested on go1.8 and higher.


You can grab binaries in the releases section. Alternatively, to get latest and greatest run:

go get -u


bombardier [<flags>] <url>

For a more detailed information about flags consult GoDoc.

Known issues

AFAIK, it's impossible to pass Host header correctly with fasthttp, you can use net/http(--http1/--http2 flags) to workaround this issue.


Example of running bombardier against this server:

> bombardier -c 125 -n 10000000 http://localhost:8080
Bombarding http://localhost:8080 with 10000000 requests using 125 connections
 10000000 / 10000000 [============================================] 100.00% 37s Done!
Statistics        Avg      Stdev        Max
  Reqs/sec    264560.00   10733.06     268434
  Latency      471.00us   522.34us    51.00ms
  HTTP codes:
    1xx - 0, 2xx - 10000000, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:   292.92MB/s

Or, against a realworld server(with latency distribution):

> bombardier -c 200 -d 10s -l
Bombarding for 10s using 200 connections
[=========================================================================] 10s Done!
Statistics        Avg      Stdev        Max
  Reqs/sec      6607.00     524.56       7109
  Latency       29.86ms     5.36ms   305.02ms
  Latency Distribution
     50%    28.00ms
     75%    32.00ms
     90%    34.00ms
     99%    48.00ms
  HTTP codes:
    1xx - 0, 2xx - 0, 3xx - 66561, 4xx - 0, 5xx - 0
    others - 5
    dialing to the given TCP address timed out - 5
  Throughput:     3.06MB/s



    Command line utility bombardier is a fast cross-platform HTTP benchmarking tool written in Go.


    go get -u


    bombardier [<flags>] <url>


        --help                  Show context-sensitive help (also try --help-long
                                and --help-man).
        --version               Show application version.
    -c, --connections=125       Maximum number of concurrent connections
    -t, --timeout=2s            Socket/request timeout
    -l, --latencies             Print latency statistics
    -m, --method=GET            Request method
    -b, --body=""               Request body
    -f, --body-file=""          File to use as request body
    -s, --stream                Specify whether to stream body using chunked
                                transfer encoding or to serve it from memory
        --cert=""               Path to the client's TLS Certificate
        --key=""                Path to the client's TLS Certificate Private Key
    -k, --insecure              Controls whether a client verifies the server's
                                certificate chain and host name
    -H, --header="K: V" ...     HTTP headers to use(can be repeated)
    -n, --requests=[pos. int.]  Number of requests
    -d, --duration=10s          Duration of test
    -r, --rate=[pos. int.]      Rate limit in requests per second
        --fasthttp              Use fasthttp client
        --http1                 Use net/http client with forced HTTP/1.x
        --http2                 Use net/http client with enabled HTTP/2.0
    -p, --print=<spec>          Specifies what to output. Comma-separated list of
                                values 'intro' (short: 'i'), 'progress' (short:
                                'p'), 'result' (short: 'r'). Examples:
                                  * i,p,r (prints everything)
                                  * intro,result (intro & result)
                                  * r (result only)
                                  * result (same as above)
    -q, --no-print              Don't output anything
    -o, --format=<spec>         Which format to use to output the result. <spec>
                                is either a name (or its shorthand) of some format
                                understood by bombardier or a path to the
                                user-defined template, which uses Go's
                                text/template syntax, prefixed with 'path:' string
                                (without single quotes), i.e.
                                "path:/some/path/to/your.template" or
                                "path:C:\some\path\to\your.template" in case of
                                Windows. Formats understood by bombardier are:
                                  * plain-text (short: pt)
                                  * json (short: j)


    <url>  Target's URL

    For detailed documentation on user-defined templates see documentation for package Link (GoDoc):


    Path Synopsis
    Simple HTTP server used for benchmarking.
    Simple HTTP server used for benchmarking.
    Package template documents the way user-defined output templates are ment to be used.
    Package template documents the way user-defined output templates are ment to be used.