mirror of
https://github.com/golang/go
synced 2024-11-22 05:04:40 -07:00
c14b2689f0
Linux/amd64, 2 x Intel Xeon E5620, 8 HT cores, 2.40GHz benchmark old ns/op new ns/op delta BenchmarkFinalizer 420.00 261.00 -37.86% BenchmarkFinalizer-2 985.00 201.00 -79.59% BenchmarkFinalizer-4 1077.00 244.00 -77.34% BenchmarkFinalizer-8 1155.00 180.00 -84.42% BenchmarkFinalizer-16 1182.00 184.00 -84.43% BenchmarkFinalizerRun 2128.00 1378.00 -35.24% BenchmarkFinalizerRun-2 1655.00 1418.00 -14.32% BenchmarkFinalizerRun-4 1634.00 1522.00 -6.85% BenchmarkFinalizerRun-8 2213.00 1581.00 -28.56% BenchmarkFinalizerRun-16 2424.00 1599.00 -34.03% Darwin/amd64, Intel L9600, 2 cores, 2.13GHz benchmark old ns/op new ns/op delta BenchmarkChanCreation 1451.00 926.00 -36.18% BenchmarkChanCreation-2 3124.00 1412.00 -54.80% BenchmarkChanCreation-4 6121.00 2628.00 -57.07% BenchmarkFinalizer 684.00 420.00 -38.60% BenchmarkFinalizer-2 11195.00 398.00 -96.44% BenchmarkFinalizer-4 15862.00 654.00 -95.88% BenchmarkFinalizerRun 2025.00 1397.00 -31.01% BenchmarkFinalizerRun-2 3920.00 1447.00 -63.09% BenchmarkFinalizerRun-4 9471.00 1545.00 -83.69% R=golang-dev, cw, rsc CC=golang-dev https://golang.org/cl/4963057
71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Repeated malloc test.
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package main
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import (
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"flag"
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"runtime"
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)
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var chatty = flag.Bool("v", false, "chatty")
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var oldsys uint64
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func bigger() {
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runtime.UpdateMemStats()
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if st := runtime.MemStats; oldsys < st.Sys {
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oldsys = st.Sys
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if *chatty {
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println(st.Sys, " system bytes for ", st.Alloc, " Go bytes")
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}
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if st.Sys > 1e9 {
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println("too big")
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panic("fail")
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}
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}
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}
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func main() {
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runtime.GC() // clean up garbage from init
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runtime.UpdateMemStats() // first call can do some allocations
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runtime.MemProfileRate = 0 // disable profiler
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runtime.MemStats.Alloc = 0 // ignore stacks
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flag.Parse()
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for i := 0; i < 1<<7; i++ {
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for j := 1; j <= 1<<22; j <<= 1 {
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if i == 0 && *chatty {
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println("First alloc:", j)
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}
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if a := runtime.MemStats.Alloc; a != 0 {
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println("no allocations but stats report", a, "bytes allocated")
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panic("fail")
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}
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b := runtime.Alloc(uintptr(j))
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runtime.UpdateMemStats()
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during := runtime.MemStats.Alloc
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runtime.Free(b)
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runtime.UpdateMemStats()
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if a := runtime.MemStats.Alloc; a != 0 {
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println("allocated ", j, ": wrong stats: during=", during, " after=", a, " (want 0)")
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panic("fail")
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}
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bigger()
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}
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if i%(1<<10) == 0 && *chatty {
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println(i)
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}
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if i == 0 {
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if *chatty {
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println("Primed", i)
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}
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// runtime.frozen = true
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}
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}
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}
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