On Wed, 1 Jul 2020 12:50:01 +0200 Victor Stinner <vstin...@python.org> wrote: > Le mer. 1 juil. 2020 à 03:53, Inada Naoki <songofaca...@gmail.com> a écrit : > > I confirmed the performance regression, although the difference is 12%. > > And I find the commit cause the regression. > > > > https://github.com/python/cpython/commit/45ec5b99aefa54552947049086e87ec01bc2fc9a > > https://bugs.python.org/issue40170 > > > > The regression is not caused by "static inline" function is not > > inlined by compiler. > > The commit changed PyType_HasFeature to call regular function > > PyType_GetFlags always. > > On Fedora 32 with GCC 10.1.1, even if PyType_GetFlags() is a function, > the function call is inlined. This is thanks to LTO
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