[cfe-dev] Clang/llvm performance tests on FreeBSD 10.0-CURRENT
matthieu.monrocq at gmail.com
Wed Sep 5 10:00:57 PDT 2012
On Tue, Sep 4, 2012 at 10:49 PM, Dimitry Andric <dimitry at andric.com> wrote:
> Hi all,
> I recently performed a series of compiler performance tests on FreeBSD
> 10.0-CURRENT, particularly comparing gcc 4.2.1 and gcc 4.7.1 against
> clang 3.1 and clang 3.2.
> The attached text file contains more information about the tests,
> some semi-cooked performance data, and my conclusions. Any errors and
> omissions are also my fault, so if you notice them, please let me know.
> The executive summary: clang compiles mostly faster than gcc (sometimes
> much faster), and uses significantly less memory.
> Finally, please note these tests were purely about compilation speed,
> not about the performance of the resulting executables. This still
> needs to be tested.
> : Also available at:
Thanks for the detailed report!
I am somewhat concerned that Clang 3.2 seems to always be 3% slower than
the 3.1 version, though I guess that there performance will be tweaked
prior to release as usual.
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