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# 目标
本节使用一个爬虫任务来展示如何追求代码的性能 。
充分理解线程、协程、进程、同步、异步、阻塞、非阻塞等概念,并能够根据具体场景选择合适的并发模型。
主线问题:如何解决IO和计算速度不匹配、如何任务分解、分发和协作 。
# 任务