Memory Leak of Golang

gistfile1.txt

Hi all,

I am studying Go, and find that it is very interesting and "battery" included.

In this mail, I want to ask something about the garbage collection rules of Go.

For example, in the following program.

package main

import (
  "math/rand"
	"time"
	"runtime"
)


func DoSomeThing(){
	a := make([][]interface{},10000)
	for i:=0;i<len(a);i++{
		a[i] = make([]interface{},10000)
		for j:=0;j<len(a[i]);j++{
			a[i][j] = rand.Float64()
		}
	}
}


func main() {
	DoSomeThing()
	for {
		println("idle")
		runtime.GC()
		time.Sleep(2*time.Second)
	}
}


It will allocate 1.6 GB memory on my windows x64 machine with go1.1 beta2.

I am confused that why the memory allocated by DoSometThing() is not freed?



Thanks