But if my understanding is correct, PGOs don’t help much with “speculative optimizations” — eg. Java can almost always elide virtual calls when only one actual class is loaded implementing an interface, reverting back to virtual calls on class load.
No matter PGO these and similar examples can’t be done without self-modifying code, while java with JIT is sort of that in a way.
No matter PGO these and similar examples can’t be done without self-modifying code, while java with JIT is sort of that in a way.