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一日一学_Go语言Context（设计及分析） - 简书
source link: http://www.jianshu.com/p/b7202f2bb477?
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context简单概述: Go服务器的每个请求都有自己的goroutine,而有的请求为了提高性能，会经常启动额外的goroutine处理请求,当该请求被取消或超时，该请求上的所有goroutines应该退出，防止资源泄露。那么context来了，它对该请求上的所有goroutines进行约束，然后进行取消信号，超时等操作。 而context优点就是简洁的管理goroutines的生命周期。...
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