Though, I don't see any discussion here on failed speculation / deoptimisation, and I do see discussion of disabling individual optimisation passes. I guess the

Though, I don't see any discussion here on failed speculation / deoptimisation, and I do see discussion of disabling individual optimisation passes. I guess the generated optimized code assumes that all the speculative types collected during startup stay stable? This makes sense in a highly controlled environment like a game engine, though it makes the project less amenable for general purpose use (which is fine).