New submission from Raymond Hettinger <raymond.hettin...@gmail.com>:
Running Tools/scripts/var_access_benchmark.py on the production macOS builds on python.org shows a performance drop-off between alpha-7 and beta-1. Apple Silicon ------------- read local 4.1ns -> 4.5ns read non_local 4.1ns -> 4.6ns read global 4.2ns -> 4.9ns read builtin 4.2ns -> 5.3ns classvar from cls 10.1ns -> 12.6ns classvar from inst 9.5 11.7 read instvar 9.2 11.3 instvar with slots 5.8 8.2 namedtuple 11.1 14.2 ... Since the effects are seen in almost every category, I suspect a build problem, a change to the eval loop, or a failure to inline some of the shared functions that used to be macros. ---------- components: Build keywords: 3.10regression messages: 392934 nosy: rhettinger priority: normal severity: normal status: open title: Broad performance regression from 3.10a7 to 3.10b1 type: performance versions: Python 3.10, Python 3.11 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue44037> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
