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by petters 2228 days ago
Perhaps they are slower because Clang is doing static analysis in this case.
1 comments

Static analysis is a lot slower but regular clang++ is also significantly slower than g++, like a 4-5 minute build time vs 2:30 on g++.

It might have something to do with a heavy usage of templates in a few files, I don't know.

Clang's autovectorization is better in a few functions I disassembled but otherwise the generated code doesn't benchmark any faster, it's better in some places, worse in others.