$ go test -v -bench=.
testing: warning: no tests to run
BenchmarkIOPipe1kB-4 20000 92145 ns/op
BenchmarkOSPipe1kB-4 1 75417337915 ns/op
BenchmarkIOPipe1mB-4 20 73405145 ns/op
BenchmarkOSPipe1mB-4 20 73737580 ns/op
BenchmarkIOPipe10mB-4 2 741943114 ns/op
BenchmarkOSPipe10mB-4 2 734819553 ns/op
BenchmarkIOPipe100mB-4 1 7343112192 ns/op
BenchmarkOSPipe100mB-4 1 7344096151 ns/op
BenchmarkIOPipe1gB-4 1 75750920371 ns/op
BenchmarkOSPipe1gB-4 1 75563199408 ns/op
PASS
ok _/Users/emmanuelodeke/Desktop/openSrc/io-vs-os 251.726s
$
$ go test -v -bench=.
testing: warning: no tests to run
BenchmarkIOPipe1kB-4 20000 91875 ns/op
BenchmarkOSPipe1kB-4 10000 114536 ns/op
BenchmarkIOPipe1mB-4 20 75339647 ns/op
BenchmarkOSPipe1mB-4 20 73644476 ns/op
BenchmarkIOPipe10mB-4 2 737125129 ns/op
BenchmarkOSPipe10mB-4 2 735175574 ns/op
BenchmarkIOPipe100mB-4 1 7348974566 ns/op
BenchmarkOSPipe100mB-4 1 7343368798 ns/op
BenchmarkIOPipe1gB-4 1 77079326462 ns/op
BenchmarkOSPipe1gB-4 1 76765157429 ns/op
PASS
ok _/Users/emmanuelodeke/Desktop/openSrc/io-vs-os 180.014s
$
$ go test -v -bench=.
testing: warning: no tests to run
BenchmarkIOPipe1kB-4 20000 91098 ns/op
BenchmarkOSPipe1kB-4 10000 121953 ns/op
BenchmarkIOPipe1mB-4 20 76778175 ns/op
BenchmarkOSPipe1mB-4 20 74097285 ns/op
BenchmarkIOPipe10mB-4 2 845868509 ns/op
BenchmarkOSPipe10mB-4 2 929460521 ns/op
BenchmarkIOPipe100mB-4 1 7514985161 ns/op
BenchmarkOSPipe100mB-4 1 7530413446 ns/op
BenchmarkIOPipe1gB-4 1 79094082240 ns/op
BenchmarkOSPipe1gB-4 1 78463944303 ns/op
PASS
ok _/Users/emmanuelodeke/Desktop/openSrc/io-vs-os 184.949s
$
Created
June 26, 2016 22:22
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io-vs-os:Pipe-comparisons to see which is better for use
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| package io_vs_os_test | |
| import ( | |
| "io" | |
| "io/ioutil" | |
| "os" | |
| "testing" | |
| ) | |
| var ( | |
| _1kB int64 = 1 << 10 | |
| _1mB int64 = 1 << 20 | |
| _10mB int64 = _1mB * 10 | |
| _100mB int64 = _1mB * 100 | |
| _1gB int64 = 1 << 30 | |
| ) | |
| func BenchmarkIOPipe1kB(b *testing.B) { benchmarkIt(b, ioPipe, _1kB) } | |
| func BenchmarkOSPipe1kB(b *testing.B) { benchmarkIt(b, osPipe, _1kB) } | |
| func BenchmarkIOPipe1mB(b *testing.B) { benchmarkIt(b, ioPipe, _1mB) } | |
| func BenchmarkOSPipe1mB(b *testing.B) { benchmarkIt(b, osPipe, _1mB) } | |
| func BenchmarkIOPipe10mB(b *testing.B) { benchmarkIt(b, ioPipe, _10mB) } | |
| func BenchmarkOSPipe10mB(b *testing.B) { benchmarkIt(b, osPipe, _10mB) } | |
| func BenchmarkIOPipe100mB(b *testing.B) { benchmarkIt(b, ioPipe, _100mB) } | |
| func BenchmarkOSPipe100mB(b *testing.B) { benchmarkIt(b, osPipe, _100mB) } | |
| func BenchmarkIOPipe1gB(b *testing.B) { benchmarkIt(b, ioPipe, _1gB) } | |
| func BenchmarkOSPipe1gB(b *testing.B) { benchmarkIt(b, osPipe, _1gB) } | |
| func ioPipe(byteCount int64) error { | |
| prc, pwc := io.Pipe() | |
| return urandomAndDiscardIt(prc, pwc, byteCount) | |
| } | |
| func osPipe(byteCount int64) error { | |
| prc, pwc, err := os.Pipe() | |
| if err != nil { | |
| return err | |
| } | |
| return urandomAndDiscardIt(prc, pwc, byteCount) | |
| } | |
| func benchmarkIt(b *testing.B, fn func(int64) error, byteCount int64) { | |
| for i := 0; i < b.N; i++ { | |
| _ = fn(byteCount) | |
| } | |
| } | |
| func urandomAndDiscardIt(rc io.ReadCloser, wc io.WriteCloser, byteCount int64) error { | |
| urandom, err := os.Open("/dev/urandom") | |
| if err != nil { | |
| return err | |
| } | |
| go func() { | |
| _, _ = io.CopyN(wc, urandom, byteCount) | |
| _ = wc.Close() | |
| _ = urandom.Close() | |
| }() | |
| _, err = io.Copy(ioutil.Discard, rc) | |
| return err | |
| } |
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