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多线程中记录任意两个代码点间的耗时,在不需要aop的情况下,可以使用该工具,比如A类中执行A,B,C上个方法,A方法中有一个步骤a1,需要记录从它开始做,到B方法中步骤b2的耗时,按业务逻辑又无法独立为独立方法以便切面时。