sock.go

package main

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

func print() {
	for {
		<-time.After(10e9)
		fmt.Println(runtime.MemStats.Alloc, runtime.MemStats.HeapAlloc)
	}
}

func main() {
	go print()
	addr, _ := net.ResolveTCPAddr(":12345")
	l, err := net.ListenTCP("tcp", addr)
	if err != nil {
		panic(err)
	}
	for {
		c, err := l.Accept()
		if err != nil {
			panic(err)
		}
		c.Close()
	}
}