I have been going through some code and found a couple of FIXME's that mention the section of code to be "slow" and I was just curious since I am relatively new to most kinds of profiling, how do you evaluate this and if anybody were to come up with a patch for this, how can they reliably show speedups in this?
I am assuming simply using valgrind or perf to cpu profile (on linux atleast) can do a decent job showcasing certain metrics like cycles spent, time of execution so on but I would appreciate it if I can get some clarity on this, as I am unsure of what is expected and the usual practice here. PS: Sorry for double mailing my patch. I was not aware that opening a PR would do the same.
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