Make ASAN build not be debug, following clangs recommendation #54094
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This needs JuliaCI/julia-buildkite#349 to actually have effect |
giordano
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domain:building
Keno
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Apr 16, 2024
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So bootstrapping with O1 is quite a bit faster 🤔 |
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But building the pkgimages of the stdlibs is still quite slow, no? |
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Yes, it might be worth it to understand why ASAN is so expensive for us, I believe the expected overhead is 2x and we are seeing almost 4 and for pkgimages it's almost 20x but this still halves the time by half |
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Can this this merged since it does sensibly improve ASAN build time, and further improvement can be done in follow up PR? |
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Following LLVMs/Googles recommendation, ASAN should be run with optimization otherwise performance is awful (which it is for us). The asan build is currently by far the longest and it's just a build. I would like for us to one day run ASAN and TSAN tests and maybe even MSAN, but ASAN is the cheapest and less hassly to do it, because it has false negatives instead of false positives like the other sanitizers.
TODO: Make the setting respect if the user asked for a debug build or not.