gistfile1.txt

package main

import (
	"log"
	"runtime"
)

func main() {
	m := mkmap()
	for _ = range m {
		break
	}
	log.Println("before GC", runtime.MemStats.HeapAlloc)
	runtime.GC()
	log.Println("after GC", runtime.MemStats.HeapAlloc)
}


func mkmap() map[uint64]interface{} {
	m := make(map[uint64]interface{})
	for i := 0; i < 1e6; i++ {
		m[uint64(i)] = nil
	}

	for i := range m {
		m[i] = nil, false
	}
	return m
}