SpringBoot强化系列：线程池及CountDownLatch并行执行任务
本文共 283 字，大约阅读时间需要 1 分钟。
1 场景
多线程并行处理多个任务，所有任务执行结束，获取执行结果，提高任务执行效率，使用多线程处理任务耗时取决于单个线程耗时最长的任务，而不是时间的叠加。单线程执行多个任务，耗时则是所有任务的耗时总和。
现有三个任务，任务1，任务2，任务3，耗时如表1所示。| 序号 | 任务 | 耗时 |
|---|---|---|
| 1 | 任务1 | t1 |
| 2 | 任务2 | t2 |
| 3 | 任务3 | t3 |
其中，t2>t3>t1
- 多线程执行多个任务的耗时取决于某个耗时最长的任务，耗时结果如图1所示。
- 即耗时t=t2。
- 单线程执行多个任务的耗时是所有任务耗时的总和，耗时结果如图2所示。
- 即耗时t=t1+t2+t3。
转载地址：http://baht.baihongyu.com/
你可能感兴趣的文章
No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
查看>>
no connection could be made because the target machine actively refused it.问题解决
查看>>
No Datastore Session bound to thread, and configuration does not allow creation of non-transactional
查看>>
No fallbackFactory instance of type class com.ruoyi---SpringCloud Alibaba_若依微服务框架改造---工作笔记005
查看>>
No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalanc
查看>>
No mapping found for HTTP request with URI [/...] in DispatcherServlet with name ...的解决方法
查看>>
No mapping found for HTTP request with URI [/logout.do] in DispatcherServlet with name 'springmvc'
查看>>
No module named 'crispy_forms'等使用pycharm开发
查看>>
No module named 'pandads'
查看>>
No module named cv2
查看>>
No module named tensorboard.main在安装tensorboardX的时候遇到的问题
查看>>
No module named ‘MySQLdb‘错误解决No module named ‘MySQLdb‘错误解决
查看>>
No new migrations found. Your system is up-to-date.
查看>>
No qualifying bean of type XXX found for dependency XXX.
查看>>
No qualifying bean of type ‘com.netflix.discovery.AbstractDiscoveryClientOptionalArgs＜?＞‘ available
查看>>
No resource identifier found for attribute 'srcCompat' in package的解决办法
查看>>
no session found for current thread
查看>>
No static resource favicon.ico.
查看>>
no such file or directory AndroidManifest.xml
查看>>
No toolchains found in the NDK toolchains folder for ABI with prefix: mips64el-linux-android
查看>>