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author | Taylor Gerring <taylor.gerring@gmail.com> | 2015-02-16 21:28:33 +0800 |
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committer | Taylor Gerring <taylor.gerring@gmail.com> | 2015-02-16 21:28:33 +0800 |
commit | 702218008ee2b6d708d6b2821cdef80736bb3224 (patch) | |
tree | d55ff7ce88187082378e7d8e4c2f3aad14d23b4e /Godeps/_workspace/src/gopkg.in/check.v1/benchmark.go | |
parent | 202362d9258335c695eb75f55f4be74a50a1af33 (diff) | |
download | go-tangerine-702218008ee2b6d708d6b2821cdef80736bb3224.tar.gz go-tangerine-702218008ee2b6d708d6b2821cdef80736bb3224.tar.zst go-tangerine-702218008ee2b6d708d6b2821cdef80736bb3224.zip |
Add versioned dependencies from godep
Diffstat (limited to 'Godeps/_workspace/src/gopkg.in/check.v1/benchmark.go')
-rw-r--r-- | Godeps/_workspace/src/gopkg.in/check.v1/benchmark.go | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/Godeps/_workspace/src/gopkg.in/check.v1/benchmark.go b/Godeps/_workspace/src/gopkg.in/check.v1/benchmark.go new file mode 100644 index 000000000..48cb8c811 --- /dev/null +++ b/Godeps/_workspace/src/gopkg.in/check.v1/benchmark.go @@ -0,0 +1,163 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package check + +import ( + "fmt" + "runtime" + "time" +) + +var memStats runtime.MemStats + +// testingB is a type passed to Benchmark functions to manage benchmark +// timing and to specify the number of iterations to run. +type timer struct { + start time.Time // Time test or benchmark started + duration time.Duration + N int + bytes int64 + timerOn bool + benchTime time.Duration + // The initial states of memStats.Mallocs and memStats.TotalAlloc. + startAllocs uint64 + startBytes uint64 + // The net total of this test after being run. + netAllocs uint64 + netBytes uint64 +} + +// StartTimer starts timing a test. This function is called automatically +// before a benchmark starts, but it can also used to resume timing after +// a call to StopTimer. +func (c *C) StartTimer() { + if !c.timerOn { + c.start = time.Now() + c.timerOn = true + + runtime.ReadMemStats(&memStats) + c.startAllocs = memStats.Mallocs + c.startBytes = memStats.TotalAlloc + } +} + +// StopTimer stops timing a test. This can be used to pause the timer +// while performing complex initialization that you don't +// want to measure. +func (c *C) StopTimer() { + if c.timerOn { + c.duration += time.Now().Sub(c.start) + c.timerOn = false + runtime.ReadMemStats(&memStats) + c.netAllocs += memStats.Mallocs - c.startAllocs + c.netBytes += memStats.TotalAlloc - c.startBytes + } +} + +// ResetTimer sets the elapsed benchmark time to zero. +// It does not affect whether the timer is running. +func (c *C) ResetTimer() { + if c.timerOn { + c.start = time.Now() + runtime.ReadMemStats(&memStats) + c.startAllocs = memStats.Mallocs + c.startBytes = memStats.TotalAlloc + } + c.duration = 0 + c.netAllocs = 0 + c.netBytes = 0 +} + +// SetBytes informs the number of bytes that the benchmark processes +// on each iteration. If this is called in a benchmark it will also +// report MB/s. +func (c *C) SetBytes(n int64) { + c.bytes = n +} + +func (c *C) nsPerOp() int64 { + if c.N <= 0 { + return 0 + } + return c.duration.Nanoseconds() / int64(c.N) +} + +func (c *C) mbPerSec() float64 { + if c.bytes <= 0 || c.duration <= 0 || c.N <= 0 { + return 0 + } + return (float64(c.bytes) * float64(c.N) / 1e6) / c.duration.Seconds() +} + +func (c *C) timerString() string { + if c.N <= 0 { + return fmt.Sprintf("%3.3fs", float64(c.duration.Nanoseconds())/1e9) + } + mbs := c.mbPerSec() + mb := "" + if mbs != 0 { + mb = fmt.Sprintf("\t%7.2f MB/s", mbs) + } + nsop := c.nsPerOp() + ns := fmt.Sprintf("%10d ns/op", nsop) + if c.N > 0 && nsop < 100 { + // The format specifiers here make sure that + // the ones digits line up for all three possible formats. + if nsop < 10 { + ns = fmt.Sprintf("%13.2f ns/op", float64(c.duration.Nanoseconds())/float64(c.N)) + } else { + ns = fmt.Sprintf("%12.1f ns/op", float64(c.duration.Nanoseconds())/float64(c.N)) + } + } + memStats := "" + if c.benchMem { + allocedBytes := fmt.Sprintf("%8d B/op", int64(c.netBytes)/int64(c.N)) + allocs := fmt.Sprintf("%8d allocs/op", int64(c.netAllocs)/int64(c.N)) + memStats = fmt.Sprintf("\t%s\t%s", allocedBytes, allocs) + } + return fmt.Sprintf("%8d\t%s%s%s", c.N, ns, mb, memStats) +} + +func min(x, y int) int { + if x > y { + return y + } + return x +} + +func max(x, y int) int { + if x < y { + return y + } + return x +} + +// roundDown10 rounds a number down to the nearest power of 10. +func roundDown10(n int) int { + var tens = 0 + // tens = floor(log_10(n)) + for n > 10 { + n = n / 10 + tens++ + } + // result = 10^tens + result := 1 + for i := 0; i < tens; i++ { + result *= 10 + } + return result +} + +// roundUp rounds x up to a number of the form [1eX, 2eX, 5eX]. +func roundUp(n int) int { + base := roundDown10(n) + if n < (2 * base) { + return 2 * base + } + if n < (5 * base) { + return 5 * base + } + return 10 * base +} |