| // run |
| |
| // Copyright 2011 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. |
| |
| // Test that goroutines and garbage collection run during init. |
| |
| package main |
| |
| import "runtime" |
| |
| var x []byte |
| |
| func init() { |
| c := make(chan int) |
| go send(c) |
| <-c |
| |
| const chunk = 1 << 20 |
| memstats := new(runtime.MemStats) |
| runtime.ReadMemStats(memstats) |
| sys := memstats.Sys |
| b := make([]byte, chunk) |
| for i := range b { |
| b[i] = byte(i%10 + '0') |
| } |
| s := string(b) |
| for i := 0; i < 1000; i++ { |
| x = []byte(s) |
| } |
| runtime.ReadMemStats(memstats) |
| sys1 := memstats.Sys |
| if sys1-sys > chunk*50 { |
| println("allocated 1000 chunks of", chunk, "and used ", sys1-sys, "memory") |
| } |
| } |
| |
| func send(c chan int) { |
| c <- 1 |
| } |
| |
| func main() { |
| } |