New submission from Yury Selivanov: The attached patch implements an opcode cache for LOAD_GLOBAL opcode, making it 2x faster.
The idea is to use the new co_extra field of code objects & PEP 509 to attach a cache structure pointing directly to the resolved global name. When globals or builtins are updated, the cache is invalidated. The patch adds a new file "ceval_cache.h" which provides some infrastructure to ease the pain of implementing new caches for other opcode types. I can strip down all macros from that file if Victor finds it too hard to review. Here's a simple script I used to make sure that the cache is working: https://gist.github.com/1st1/a9660aabdcf6b8bc6205b9fe39a82bba You can also set OPCACHE_COLLECT_STATS to 1 to get debug stats output for the cache. ---------- assignee: yselivanov components: Interpreter Core files: load_globals_cache.patch keywords: patch messages: 276485 nosy: gvanrossum, haypo, yselivanov priority: critical severity: normal stage: patch review status: open title: Implement LOAD_GLOBAL opcode cache type: performance versions: Python 3.6 Added file: http://bugs.python.org/file44668/load_globals_cache.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue28158> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
