A couple days ago I had a bit of free time in the evening, and I was bored, so I decided to play with BOLT a little bit. No, not the dog from a Disney movie, the BOLT tool from LLVM project, aimed at optimizing binaries. It took me a while to get it working, but the results are unexpectedly good, in some cases up to 40%. So let me share my notes and benchmark results, and maybe there’s something we can learn from it. We’ll start by going through a couple rabbit holes first, though.
