On Wed, 1 Mar 2017 12:28:24 -0500 Barry Warsaw <ba...@python.org> wrote: > > Louis (Cc'd here) has done a ton of work to measure and analyze the problem, > but we've more or less hit a roadblock, so we're taking the issue public to > see if anybody on this mailing list has further ideas. A detailed analysis is > available in this Google doc: > > https://docs.google.com/document/d/1zrV3OIRSo99fd2Ty4YdGk_scmTRDmVauBprKL8eij6w/edit > > The document should be public for comments and editing.
I may be misunderstanding the document, but this lacks at least a comparison of the *same* interpreter version with different compiler versions. As for the high level: what if the training set used for PGO in Xenial has become skewed or inadequate? Just a thought, as it would imply that PGO+LTO uses wrong information for code placement and other optimizations. Regards Antoine. _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
