Hi there, I have noticed more and more subtle and hard to track serious bugs in numpy and scipy, due to the use of advanced optimization features (flags, or gcc intrinsics).
I am wondering whether those are worth it: they compile wrongly under quite a few configurations, and it is not always obvious to find the cause (case in point: gcc 4.4 with numpy 1.8.0 causes infinite loop in scipy.stats, which disappear if I disable the intrinsics in numpy/npy_config.h). Maybe they should be disabled by default, and only built in if required ? Do we know for sure they bring significant improvements ? While gcc 4.4 is not the most recent compiler, it is not ancient either, David
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