Rethinking optimization, lower ok for all Julia code (for e.g. faster startup) as a default?

[Marc.Cox]

Jeff Bezanson remarks on LLVM "getting slower and slower"

Thx @ImreSamu, Support for A JIT compiler should operate on the Pareto rule principle "… for many outcomes, roughly 80% of consequences come from 20% of the causes (the “vital few”).[1] " @@ Pareto principle - Wikipedia Google Engineers contributed to LLVM 12 RC1 making “Machine Function Splitter” code generation optimization pass for splitting code functions into hot and cold parts. They are doing this stemming from their research that in roughly half of code functions that MORE than …