How many of us actually have any knowledge of how our compiler works? I only have a rudimentary knowledge of the Java AOT and JIT compilers. It's enough that wi

How many of us actually have any knowledge of how our compiler works? I only have a rudimentary knowledge of the Java AOT and JIT compilers. It's enough that with some work I can read `PrintAssembly` output but really, I'm not nearly that familiar with the compiler. I think you're right in that attempting to write code that specifically matches all these things is likely to prematurely optimize. I develop on Linux on an Intel consumer desktop processor, and OS X on an Intel consumer laptop processor, and I deploy to a containerized instance running on a virtualized Intel processor running on an Intel server processor. This lets me get to market quite fast. And I should be trying to figure out the wide instructions on the Intel server and if they're a good idea? I didn't even know about pcmp{e,i}str{i,m} until a couple of years ago and I have used it precisely zero times. As it stands, 400k rps and logging every request, for an ad syncing platform, and it's not breaking the bank. Spending time to learn the intricacies of the JVM is not likely to have yielded improvements.