debing.sun

@panzhongxian thanks, please wait for another eye.

@panzhongxian please also update the top comment which doesn't mention `__builtin_ctzll`.

outdated? ``` * This may sound like inefficient, but actually in the average case * there are high probabilities to find a 1 after a few iterations. */ ```

@panzhongxian thanks, It's ok now.

@xiaozhuang-a did you use any module? and can you give the fully crash log?

yes, it's probably block related.

@xiaozhuang-a do you mean you wanna avoid this crash? you can temporarily close `serverAssert(c->duration == 0);`, in theory it should have no side effects.

thanks for the minor improvement, but I'm not sure if modern compilers do the optimization for us. please wait for me to take some time to check it.

what operating system are you using?

@panzhongxian unrolled loops also means reducing the call of jump. did you do some benchmark to verify it?