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Author vstinner
Recipients lukasz.langa, methane, ned.deily, rhettinger, ronaldoussoren, vstinner
Date 2020-07-01.16:40:00
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <1593621600.78.0.452357545445.issue41181@roundup.psfhosted.org>
In-reply-to
Content 
>> Clang 6.0 doesn't support LTO and PGO?
> No, it appears not.

That's really surprising. I see LTO mentioned in LLVM 3.4 changelog for example:
https://releases.llvm.org/3.4/tools/clang/docs/ReleaseNotes.html#new-compiler-flags

Did you try to build Python with my PR? Which error message do you get? How can I try? I only own a macbook which runs a recent macOS version. Maybe I could try to get clang 6.0 on Linux.

If PGO is not available, just enabling LTO should already make Python faster significantly.

I understand why Python is built on macOS 10.9, and this issue and my PR doesn't change anything about that. I don't request to require newer CPU features or to require newer macOS API or syscall. LTO only changes how Python itself is built.
History
Date User Action Args
2020-07-01 16:40:00vstinnersetrecipients: + vstinner, rhettinger, ronaldoussoren, ned.deily, methane, lukasz.langa
2020-07-01 16:40:00vstinnersetmessageid: <1593621600.78.0.452357545445.issue41181@roundup.psfhosted.org>
2020-07-01 16:40:00vstinnerlinkissue41181 messages
2020-07-01 16:40:00vstinnercreate