New submission from Raymond Hettinger: The STORE_FAST, LOAD_FAST, and LOAD_DEREF opcodes all use fast macros for variable access. This patch harmonizes STORE_DEREF to follow the same pattern.
Both the C code and the generated assembly look nicer. Gives an approx 40% speed-up (using both Clang and GCC-6) on the "store_nonlocal" portion of the variable access benchmark at http://code.activestate.com/recipes/577834 The eliminates the nonlocal speed penalty, making cell variable updates run nearly as fast as updates to locals. ---------- assignee: serhiy.storchaka components: Interpreter Core files: fastcell.diff keywords: patch messages: 280574 nosy: rhettinger, serhiy.storchaka priority: normal severity: normal stage: patch review status: open title: Harmonize STORE_DEREF with STORE_FAST and LOAD_DEREF type: performance versions: Python 3.6, Python 3.7 Added file: http://bugs.python.org/file45442/fastcell.diff _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue28665> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
