Java:Java多线程实现性能测试
创建多线程和线程池
import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; //开启的线程数 int threadSize = 100; //创建线程池 ExecutorService executorService = Executors.newFixedThreadPool(threadSize); //开始时间 long start = System.currentTimeMillis(); //让线程池中的每一个线程都开始工作 for (int j = 0; j < threadSize; j++) { //执行线程 executorService.execute(new TestPerformance(threadSize)); } //等线程全部执行完后关闭线程池 executorService.shutdown(); executorService.awaitTermination(Integer.MAX_VALUE, TimeUnit.DAYS); //结束时间 long end = System.currentTimeMillis(); System.out.println("测试次数:" + TestPerformance.atomicInteger.get()); System.out.println("用时:" + (end - start)); System.out.println("速度:" + TestPerformance.atomicInteger.get() * 1000 / (end - start) + "次/秒");
具体逻辑
package com.test.performance; import java.util.concurrent.atomic.AtomicInteger; /** * 测试性能. */ public class TestPerformance implements Runnable { //每个线程的执行次数 private int size; //记录多线程的总执行次数,保证高并发下的原子性 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(); /////////////// //在此写入需要测试性能的代码块 /////////////// System.out.println("线程ID与对应的执行次数:" + Thread.currentThread().getId() + "--->" + count); } } }
文章转载至:https://blog.csdn.net/weixin_43192102/article/details/106195948
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作者:怒吼的萝卜
链接:http://www.cnblogs.com/nhdlb/
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