New submission from Inada Naoki <songofaca...@gmail.com>:
Currently, PyDictKeyEntry is 24bytes (hash, key, and value). We can drop the hash from entry when all keys are unicode, because unicode objects caches hash already. This will cause some performance regression on microbenchmark because dict need one more indirect access to compare hash value. On the other hand, this will reduce some RAM usage. Additionally, unlike docstrings and annotations, this includes much **hot** RAM. It will make Python more cache efficient. This is work in progress code: https://github.com/methane/cpython/pull/43 pypeformance result is in the PR too. ---------- components: Interpreter Core messages: 413892 nosy: Mark.Shannon, methane, rhettinger priority: normal severity: normal status: open title: dict: Use smaller entry for Unicode-key only dict. type: performance versions: Python 3.11 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue46845> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
