Go-标准库-runtime（三）

package main

import (
	"fmt"
	"runtime"
	"time"
)

func main() {
	var mem runtime.MemStats
	runtime.ReadMemStats(&mem)
	fmt.Printf("Alloc = %v MiB\n", mem.Alloc/1024/1024)
	fmt.Printf("TotalAlloc = %v MiB\n", mem.TotalAlloc/1024/1024)
	fmt.Printf("HeapAlloc = %v MiB\n", mem.HeapAlloc/1024/1024)
	fmt.Printf("HeapSys = %v MiB\n", mem.HeapSys/1024/1024)

	for i := 0; i < 10000; i++ {
		data := make([]byte, 1024*1024)
		time.Sleep(time.Millisecond)
	}

	runtime.GC()
	runtime.ReadMemStats(&mem)
	fmt.Printf("Alloc = %v MiB\n", mem.Alloc/1024/1024)
	fmt.Printf("TotalAlloc = %v MiB\n", mem.TotalAlloc/1024/1024)
	fmt.Printf("HeapAlloc = %v MiB\n", mem.HeapAlloc/1024/1024)
	fmt.Printf("HeapSys = %v MiB\n", mem.HeapSys/1024/1024)
}