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Thread: LLVM/Clang 3.3 Offers Performance Improvements

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  1. #1
    Join Date
    Jan 2007
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    14,348

    Default LLVM/Clang 3.3 Offers Performance Improvements

    Phoronix: LLVM/Clang 3.3 Offers Performance Improvements

    Recent compiler testing of the latest LLVM/Clang 3.3 SVN code-base has yielded some significant performance boosts for some common C/C++ benchmarks against LLVM/Clang 3.2...

    http://www.phoronix.com/vr.php?view=MTMzNjE

  2. #2
    Join Date
    Dec 2012
    Posts
    505

    Default

    Competition in the compiler space spurs performance improvements in both camps. The masses cheer. And then call Clang not free enough because it uses a permissive license.

  3. #3
    Join Date
    Jan 2012
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    179

    Default

    pretty accurate summary

  4. #4
    Join Date
    Dec 2011
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    2,006

    Default gcc

    Would love to have seen GCC 3.8 thrown in the mix.

  5. #5
    Join Date
    Feb 2013
    Posts
    6

    Default Did you benchmark using -O0 ?

    The benchmarks above have no optimizations ... what's the point ?

  6. #6
    Join Date
    Feb 2012
    Posts
    240

    Default Environment Variables...

    Quote Originally Posted by nadav View Post
    The benchmarks above have no optimizations ... what's the point ?
    PATH=/home/phoronix/clang33/Release/bin:/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
    CFLAGS=-O3 -march=native
    CXXFLAGS=-O3 -march=native

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