Above is a mutex profile output. I probably know the output meaning of profile output. I am confused with
flat flat% sum% cumulative cumulative%
0 0% 100% 20000 1000%
flat is zero but sum is 100% how to understand?
This link helps me https://www.reddit.com/r/golang/comments/7ony5f/what_is_the_meaning_of_flat_and_cum_in_golang/