alt Hacker NewsIf the results are non-deterministic, unless I'm happy with literally any possible result, then yeah, I'm going to be unhappy with all of the other results. That's what non-determinism means. What would being right always with non-deterministic results even look like in terms of code output?
Compilers have a ton of hard optimization passes, and many of those are solved well enough via stochastic algorithms. Nobody actually fully optimizes register allocation or whatever, and a few random restarts can go a long way toward some better performance.