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// Copyright 2016 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 benchmark contains benchmarking bound functions for internal use.
package benchmark
import (
"log"
"time"
)
type Benchmarks interface {
// It seems to be much faster to call a native function from Java
// when there is already a native call earlier in the stack.
// Run runs a named benchmark from a different thread, with
// no native call prior in the stack.
Run(name string, n int)
// RunDirect runs a named benchmark directly, with the native
// context from the call itself.
RunDirect(name string, n int)
// Callbacks for Go benchmarks
NewI() I
Noargs()
Onearg(_ int)
Oneret() int
Ref(_ I)
Manyargs(_, _, _, _, _, _, _, _, _, _ int)
String(_ string)
StringRetShort() string
StringRetLong() string
Slice(_ []byte)
}
type (
I interface {
F()
}
AnI struct {
}
)
func (_ *AnI) F() {
}
func NewI() I {
return new(AnI)
}
func runBenchmark(name string, f func(n int)) {
// Run once for warmup
f(1)
n := 1000
var dt time.Duration
minDuration := 1 * time.Second
for dt < minDuration {
n *= 2
t0 := time.Now()
f(n)
dt = time.Since(t0)
}
log.Printf("Benchmark%s %d %d ns/op\n", name, n, dt.Nanoseconds()/int64(n))
}
func runGoBenchmark(name string, f func()) {
runBenchmark("Go"+name, func(n int) {
for i := 0; i < n; i++ {
f()
}
})
runBenchmark("Go"+name+"Direct", func(n int) {
done := make(chan struct{})
go func() {
for i := 0; i < n; i++ {
f()
}
close(done)
}()
<-done
})
}
func RunBenchmarks(b Benchmarks) {
names := []string{
"Empty",
"Noargs",
"Onearg",
"Oneret",
"Manyargs",
"Refforeign",
"Refgo",
"StringShort",
"StringLong",
"StringShortUnicode",
"StringLongUnicode",
"StringRetShort",
"StringRetLong",
"SliceShort",
"SliceLong",
}
for _, name := range names {
runBenchmark("Foreign"+name, func(n int) {
b.Run(name, n)
})
runBenchmark("Foreign"+name+"Direct", func(n int) {
b.RunDirect(name, n)
})
}
runGoBenchmark("Empty", func() {})
runGoBenchmark("Noarg", func() { b.Noargs() })
runGoBenchmark("Onearg", func() { b.Onearg(0) })
runGoBenchmark("Oneret", func() { b.Oneret() })
foreignRef := b.NewI()
runGoBenchmark("Refforeign", func() { b.Ref(foreignRef) })
goRef := NewI()
runGoBenchmark("Refgo", func() { b.Ref(goRef) })
runGoBenchmark("Manyargs", func() { b.Manyargs(0, 0, 0, 0, 0, 0, 0, 0, 0, 0) })
runGoBenchmark("StringShort", func() { b.String(ShortString) })
runGoBenchmark("StringLong", func() { b.String(LongString) })
runGoBenchmark("StringShortUnicode", func() { b.String(ShortStringUnicode) })
runGoBenchmark("StringLongUnicode", func() { b.String(LongStringUnicode) })
runGoBenchmark("StringRetShort", func() { b.StringRetShort() })
runGoBenchmark("StringRetLong", func() { b.StringRetLong() })
runGoBenchmark("SliceShort", func() { b.Slice(ShortSlice) })
runGoBenchmark("SliceLong", func() { b.Slice(LongSlice) })
}
func Noargs() {
}
func Onearg(_ int) {
}
func Manyargs(_, _, _, _, _, _, _, _, _, _ int) {
}
func Oneret() int {
return 0
}
func String(_ string) {
}
func StringRetShort() string {
return ShortString
}
func StringRetLong() string {
return LongString
}
func Slice(_ []byte) {
}
func Ref(_ I) {
}
var (
ShortSlice = make([]byte, 10)
LongSlice = make([]byte, 100000)
)
const (
ShortString = "Hello, World!"
LongString = "Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World!"
ShortStringUnicode = "Hello, 世界!"
LongStringUnicode = "Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界!"
)
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