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Perf regressions on many benchmarks with AMD Threadripper #43756
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This is unlikely to be AMD specific, at the very least it'll probably affect all Haswell-class (AVX2) CPUs - the article says as much: "unfortunately the release build of LLVM Clang Git was pointing to performance regressions compared to LLVM Clang 9.0 stable. We've also seen Clang 10 running slower than Clang 9 on other systems and will have those additional results out in the coming days." Is anyone setup with a suitable machine to run a git bisect script to track the regression(s) down? |
Sounds like the sub-bugs have been fixed or marked as wontfix. I'm guessing we're not looking further into this? |
Right, it should be fine now |
mentioned in issue #43884 |
mentioned in issue #43900 |
Extended Description
Phoronix ran some benchmarks with Clang 9/10 and GCC 9/10 on AMD. The article shows significant performance regressions in multiple benchmarks.
https://www.phoronix.com/scan.php?page=article&item=gcc-clang-3960x&num=2
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