mirror of
https://github.com/golang/go
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45 lines
800 B
Go
45 lines
800 B
Go
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// $G $D/$F.go && $L $F.$A && ./$A.out
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// Copyright 2011 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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// Test that goroutines and garbage collection run during init.
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package main
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import "runtime"
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var x []byte
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func init() {
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c := make(chan int)
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go send(c)
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<-c
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const chunk = 1<<20
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runtime.UpdateMemStats()
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sys := runtime.MemStats.Sys
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b := make([]byte, chunk)
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for i := range b {
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b[i] = byte(i%10 + '0')
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}
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s := string(b)
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for i := 0; i < 1000; i++ {
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x = []byte(s)
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}
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runtime.UpdateMemStats()
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sys1 := runtime.MemStats.Sys
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if sys1-sys > chunk*50 {
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println("allocated 1000 chunks of", chunk, "and used ", sys1-sys, "memory")
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}
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}
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func send(c chan int) {
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c <- 1
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}
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func main() {
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}
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