JAVA 递归线程池 ExecutorService / ForkJoinPool

Posted 2021-02-11 weimjsam

测试工具启动会递归的方式进行子进程的消息获取，目前有2种常用的ExecutorService / ForkJoinPool

为了测试哪种效果较好，我们来写个测试Demo，循环5555555次+1（加锁），统计每种执行完后耗时和GC数据

 

结果很明显，递归线程池使用ForkJoinPool更佳

 

int nCpu = Runtime.getRuntime().availableProcessors();

ExecutorService executorPool  = Executors.newFixedThreadPool(nCpu);
ForkJoinPool forkJoinPool = new ForkJoinPool(nCpu);

 

TestData:5555555 , RunTime:1543 ms ：ExecutorService executorPool

TestData:5555555 , RunTime:746 ms ：ForkJoinPool forkJoinPool