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sync.WaitGroup 实现逻辑和源码解析

Posted by 夏泽民 Mar 4, 2020

方便的并发，是Golang的一大特色优势，而使用并发，对sync包的WaitGroup不会陌生。WaitGroup主要用来做Golang并发实例即Goroutine的等待，当使用go启动多个并发程序，通过waitgroup可以等待所有go程序结束后再执行后面的代码逻辑，比如： func Main() { wg := sync.WaitGroup{} for i := 0; i < 10; i++ { wg.Add(1) go func() { defer wg.Done() time.Sleep(10 * time.Second) }()

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sync.Pool 的设计与实现

Posted by 夏泽民 Mar 4, 2020

https://gocn.vip/topics/9921 Go 1.13 版本中有几个比较大的修改，其中之一是sync.Pool修改了部分实现，减小某些极端情况下的性能开销。文中内容来源于笔者读完 sync.Pool 源代码的思考和总结，内容以 Go 1.13 中的实现为准，少量内容涉及到 Go 1.13 之前，如有误区请读者多多指教。

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regexp

Posted by 夏泽民 Mar 4, 2020

准则

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Optimizing a Golang service to reduce over 40% CPU

Posted by 夏泽民 Mar 4, 2020

https://coralogix.com/log-analytics-blog/optimizing-a-golang-service-to-reduce-over-40-cpu/

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httptest

Posted by 夏泽民 Mar 4, 2020

https://golang.org/pkg/net/http/httptest/ https://ieftimov.com/post/testing-in-go-testing-http-servers/ https://ieftimov.com/post/testing-in-go-subtests/

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