On: Do not taunt happy fun branch predictor

[shoo]

Learn how to use a decent profiler. if you're running linux, that's probably perf:

https://man7.org/linux/man-pages/man1/perf.1.html

https://www.brendangregg.com/perf.html

Here's a fun article from the cloudflare blog that gives an example of using of perf to diagnose performance of a small utility: https://blog.cloudflare.com/when-bloom-filters-dont-bloom/

Matt Godbolt's compiler explorer is also worth checking out: https://godbolt.org/