On Tue, Apr 6, 2021 at 8:34 AM heng zhang <byone.heng@xxxxxxxxx> wrote: > As you said， the 8th line has some unexecuted parts, i.e., “ i++ ” so why > is not the execution time of the 8th line 1*? > The process of mapping source lines to object file basic blocks and back again is very complicated, depends on compiler optimizations and the source code, and we don't always do a perfect job of it. The gcov output should always be considered reasonable estimates. If you want better answers, try lowering the optimization level, or adding more newlines to your code so you have fewer statements on each source line. Jim
