Speaking as somebody who is a performance geek, my knowledge came from relentless experimenting over the years (starting in the 8 bit era). Beyond the basics, I haven’t seen much on high-performance engineering online. To learn, you need to do the hard yards and I think performance tweaking becomes almost instinctive rather than something driven by a hard set of rules.

At a low enough level, every performance tweak becomes unique and bespoke.

Of course, you could find people online talking about how to write high-performance code, but beyond a few basic techniques, their advice may not work for you — nobody can write a generalist article about performance engineering that will definitely solve the problem you have right now.

Arguably, there are fewer patterns for an LLM to infer as highly optimised code tends to become more and more opaque in the search for a nanosecond here or there.