The openmp comparisons do have some merit. For example graphicsmagick here, it is less than 2x on the 8-core bulldozer: bad quality parallelization there.
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GCC 4.8.0 vs. LLVM Clang 3.3 Compiler Performance
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Originally posted by leonmaxx View PostI'm very surprised about FX perfomance in some tests.
Clang: seems like next release will finally beat GCC, and be a good replacement for it (except OpenMP).
But you summarized nicely how misleading the text of this article is - again
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Originally posted by leonmaxx View PostNope, this means that clang compiled single thread perfomance equals 2-4 gcc threads.
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Originally posted by ArneBab View PostExcept that it only was faster in two tests (in one of them only on one single CPU out of 3) and slower in everything else? (I don?t count compile times as tests).
But you summarized nicely how misleading the text of this article is - again
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compiler optimization
(Sorry I didn't read too closely if it already does this, and didn't look in the source to check). Anyway one thought is "is this using gcc -march=native"? and another might be to use gcc's profile guided optimization for it. And/or clang's equivalent if it exists.
Cheers.
-roger-
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