alt Hacker News> Two small edits close most of it: compute the loop bounds into locals before the loop,
I always assumed any decent runtime/compiler takes care of such optimisations, and usually leave such things to JDK in my Java code. Is that really not the case?
Decent ones do. .NET's JIT has historically (before ryujit especially and tbh I haven't looked at .NET much in the past decade) not been decent, general statements about decent compilers never applied to it. It has been playing catch-up lately but apparently it still has a ways to go.