test

test.go

package main

import (
	"fmt"
	"strconv"
	"sync"
	"time"
)

func main() {
	lock()
	rwlock()
}
func lock() {
	start := time.Now()
	var tt = map[int]string{}
	var lock = sync.Mutex{}
	var wg = sync.WaitGroup{}
	wg.Add(1010)
	write := func(i int) {
		lock.Lock()
		defer lock.Unlock()
		time.Sleep(50 * time.Millisecond)
		tt[i/10] = strconv.Itoa(i)
		wg.Done()
	}
	read := func(i int) {
		lock.Lock()
		defer lock.Unlock()
		time.Sleep(20 * time.Millisecond)
		fmt.Sprintf(tt[i/10])
		wg.Done()
	}
	go func() {
		for i := 0; i < 10; i++ {
			write(i)
		}
	}()
	go func() {
		for i := 0; i < 1000; i++ {
			read(i)
		}
	}()
	wg.Wait()
	fmt.Println(time.Since(start))
}
func rwlock() {
	start := time.Now()
	var tt = map[int]string{}
	var lock = sync.RWMutex{}
	var wg = sync.WaitGroup{}
	wg.Add(1010)
	write := func(i int) {
		lock.Lock()
		defer lock.Unlock()
		time.Sleep(20 * time.Millisecond)
		tt[i/10] = strconv.Itoa(i)
		wg.Done()
	}
	read := func(i int) {
		lock.RLock()
		defer lock.RUnlock()
		time.Sleep(20 * time.Millisecond)
		fmt.Sprintf(tt[i/10])
		wg.Done()
	}
	go func() {
		for i := 0; i < 10; i++ {
			write(i)
		}
	}()
	go func() {
		for i := 0; i < 1000; i++ {
			read(i)
		}
	}()
	wg.Wait()
	fmt.Println(time.Since(start))
}