diff options
author | Dmitriy Vyukov <dvyukov@google.com> | 2011-06-02 10:52:46 -0400 |
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committer | Russ Cox <rsc@golang.org> | 2011-06-02 10:52:46 -0400 |
commit | 2653b4fbcc5be866dd478f79bf6854db8ede7ffd (patch) | |
tree | f3ea67e93b472d3e4df051524d948af1ca96e946 | |
parent | d1bdff5448e7aadd045155fa4851dabb80fa98f3 (diff) | |
download | go-2653b4fbcc5be866dd478f79bf6854db8ede7ffd.tar.gz go-2653b4fbcc5be866dd478f79bf6854db8ede7ffd.zip |
testing: fix MB/s computation, documentation
R=rsc
CC=golang-dev
https://golang.org/cl/4529100
-rw-r--r-- | src/pkg/testing/benchmark.go | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/src/pkg/testing/benchmark.go b/src/pkg/testing/benchmark.go index cf73e2b48f..db4c65941c 100644 --- a/src/pkg/testing/benchmark.go +++ b/src/pkg/testing/benchmark.go @@ -150,7 +150,7 @@ func (b *B) run() BenchmarkResult { type BenchmarkResult struct { N int // The number of iterations. Ns int64 // The total time taken. - Bytes int64 // The total number of bytes processed. + Bytes int64 // Bytes processed in one iteration. } func (r BenchmarkResult) NsPerOp() int64 { @@ -160,13 +160,20 @@ func (r BenchmarkResult) NsPerOp() int64 { return r.Ns / int64(r.N) } +func (r BenchmarkResult) mbPerSec() float64 { + if r.Bytes <= 0 || r.Ns <= 0 || r.N <= 0 { + return 0 + } + return float64(r.Bytes) * float64(r.N) / float64(r.Ns) * 1e3 +} + func (r BenchmarkResult) String() string { - ns := r.NsPerOp() + mbs := r.mbPerSec() mb := "" - if ns > 0 && r.Bytes > 0 { - mb = fmt.Sprintf("\t%7.2f MB/s", (float64(r.Bytes)/1e6)/(float64(ns)/1e9)) + if mbs != 0 { + mb = fmt.Sprintf("\t%7.2f MB/s", mbs) } - return fmt.Sprintf("%8d\t%10d ns/op%s", r.N, ns, mb) + return fmt.Sprintf("%8d\t%10d ns/op%s", r.N, r.NsPerOp(), mb) } // An internal function but exported because it is cross-package; part of the implementation |