Bug 79704 - [meta-bug] Phoronix Test Suite compiler performance issues
Summary: [meta-bug] Phoronix Test Suite compiler performance issues
Status: NEW
Alias: None
Product: gcc
Classification: Unclassified
Component: middle-end (show other bugs)
Version: unknown
: P3 normal
Target Milestone: ---
Assignee: Not yet assigned to anyone
URL: https://www.phoronix-test-suite.com/
Keywords: meta-bug, missed-optimization
Depends on: 51017 55278 78405 79703 68128 78406 81554 89275
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Reported: 2017-02-24 09:35 UTC by Uroš Bizjak
Modified: 2021-08-24 19:13 UTC (History)
3 users (show)

See Also:
Known to work:
Known to fail:
Last reconfirmed: 2017-02-24 00:00:00


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Description Uroš Bizjak 2017-02-24 09:35:37 UTC
This meta-bug tracks Phoronix Test Suite [1] compiler performance issues.

[1] https://www.phoronix-test-suite.com/
Comment 1 Jakub Jelinek 2017-02-24 09:46:09 UTC
I had recently a quick look at http://www.phoronix.com/scan.php?page=article&item=gcc7-clang4-jan&num=2 EP-DGEMM where Phoronix claims clang is over 2.5x faster than gcc and in my limited understanding pretty much all time is spent in the system libraries not compiled with the test (blas, and even one written in fortran), so I don't understand any difference at all on that test (unless it uses very different libraries or very different configuration, e.g. using C blas instead of Fortran blas or vice versa etc.).  After all, LLVM doesn't have a viable Fortran FE anyway.