Java：Java多線程實現性能測試

創建多線程和線程池

 

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
 
//開啟的線程數
int threadSize = 100;  
//創建線程池
ExecutorService executorService = Executors.newFixedThreadPool(threadSize);
//開始時間
long start = System.currentTimeMillis();
//讓線程池中的每一個線程都開始工作
for (int j = 0; j < threadSize; j++) {
    //執行線程
    executorService.execute(new TestPerformance(threadSize));
}
//等線程全部執行完后關閉線程池
executorService.shutdown();
executorService.awaitTermination(Integer.MAX_VALUE, TimeUnit.DAYS);
//結束時間
long end = System.currentTimeMillis();

System.out.println("測試次數：" + TestPerformance.atomicInteger.get());
System.out.println("用時：" + (end - start));
System.out.println("速度：" + TestPerformance.atomicInteger.get() * 1000 / (end - start) + "次/秒");

 

 

具體邏輯

package com.test.performance;
 
 
import java.util.concurrent.atomic.AtomicInteger;
 
/**
 * 測試性能.
 */
public class TestPerformance implements Runnable {
 
    //每個線程的執行次數
    private int size;
 
    //記錄多線程的總執行次數，保證高並發下的原子性
    public static AtomicInteger atomicInteger = new AtomicInteger(0);
 
    public TestPerformance(int size) {
        this.size = size;
    }
 
    @Override
    public void run() {
 
        int count = 0;
        while (count < size) {
            count++;
 
            atomicInteger.getAndIncrement();
 
            ///////////////
        //在此寫入需要測試性能的代碼塊
        ///////////////
 
            System.out.println("線程ID與對應的執行次數：" + Thread.currentThread().getId() + "--->" + count);
        }
    }
}

 

文章轉載至：https://blog.csdn.net/weixin_43192102/article/details/106195948