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I agree it would be interesting and a fun project! Correct me if I'm wrong, but the problem with PGO is that every time the code changes the PGO needs to be updated as well. Also, my past experience with PGO (for the GraalVM native-image) is that it improves a bit, but not much. Maybe 50% at best. But again, the only way to know for sure is to do it and measure it. That's something we should definitely dig deeper to see what kind of difference (in practice) it can make.





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