go test -race
go test -v -run=^$ -bench=.
go test -v -run=^$ -bench=^BenchmarkHi$ -benchtime=2s -cpuprofile=prof.cpu
go test -v -run=^$ -bench=. -benchtime=3s -memprofile=prof.mem -cpuprofile=prof.cpu
go tool pprof web.test prof.cpu
go tool pprof -alloc_objects web.test prof.mem
go tool pprof -text -alloc_objects -cum web.test prof.mem
go test -cover -covermode count -coverprofile cover.out
go tool cover -html=cover.out