Re: [arch-general] Fedora Speeds Up Python 3.

From: Ralph Corderoy Sent: Tue Nov 26 11:07:36 CET 2019 To: Subject: [arch-general] Fedora Speeds Up Python 3.

Hi,

I thought this might be of interest. https://fedoraproject.org/wiki/Changes/PythonNoSemanticInterpositionSpeedup

By building with -fno-semantic-interposition they remove the PLT that provides a level of indirection when calling a libpython function. libpython often calls itself and the PLT adds L1-cache pressure plus prevents inlining. Gives gains of 25% on some workloads.

-- Cheers, Ralph.

Does it work alongside "-fno-plt" flag that Arch uses? Yours sincerely G. K.