gcov 和 gprof
gcov 和 gprof 都是 GNU 开发的程序。它们为程序员和测试工程师提供了很好的工具。
前者能够做 coverage 评测，这对 QA 来说会有很大的帮助。后者则能提供一个程序运行的 profile，帮助程序员快速找到程序的 hotspot。以前在看 CS APP 的时候曾用过 gprof。但是 gcov 是今天才知道的。原来像英特尔这样的大公司使用 GNU 工具的频度还是很高的。
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