https://github.com/python/cpython/commit/a95dca7b9891e673e77f868cac05b2068bc... commit: a95dca7b9891e673e77f868cac05b2068bce8b3a branch: main author: Bénédikt Tran <10796600+picnixz@users.noreply.github.com> committer: picnixz <10796600+picnixz@users.noreply.github.com> date: 2025-01-23T14:49:36Z summary: gh-118761: Improve import time for `pstats` and `zipfile` (#128981) Importing `pstats` or `zipfile` is now roughly 20% faster. This is achieved by removing type annotations depending on `typing`. files: A Misc/NEWS.d/next/Library/2025-01-18-11-24-02.gh-issue-118761.G8MmxY.rst M Lib/pstats.py M Lib/zipfile/__init__.py diff --git a/Lib/pstats.py b/Lib/pstats.py index 46e18fb7592a77..becaf35580eaee 100644 --- a/Lib/pstats.py +++ b/Lib/pstats.py @@ -29,7 +29,6 @@ from enum import StrEnum, _simple_enum from functools import cmp_to_key from dataclasses import dataclass -from typing import Dict __all__ = ["Stats", "SortKey", "FunctionProfile", "StatsProfile"] @@ -69,7 +68,7 @@ class FunctionProfile: class StatsProfile: '''Class for keeping track of an item in inventory.''' total_tt: float - func_profiles: Dict[str, FunctionProfile] + func_profiles: dict[str, FunctionProfile] class Stats: """This class is used for creating reports from data generated by the diff --git a/Lib/zipfile/__init__.py b/Lib/zipfile/__init__.py index 49c40032d848f1..b8b496ad9471f4 100644 --- a/Lib/zipfile/__init__.py +++ b/Lib/zipfile/__init__.py @@ -13,7 +13,6 @@ import sys import threading import time -from typing import Self try: import zlib # We may need its compression method @@ -606,7 +605,7 @@ def from_file(cls, filename, arcname=None, *, strict_timestamps=True): return zinfo - def _for_archive(self, archive: ZipFile) -> Self: + def _for_archive(self, archive): """Resolve suitable defaults from the archive. Resolve the date_time, compression attributes, and external attributes diff --git a/Misc/NEWS.d/next/Library/2025-01-18-11-24-02.gh-issue-118761.G8MmxY.rst b/Misc/NEWS.d/next/Library/2025-01-18-11-24-02.gh-issue-118761.G8MmxY.rst new file mode 100644 index 00000000000000..3b3f3f7d98c5d6 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2025-01-18-11-24-02.gh-issue-118761.G8MmxY.rst @@ -0,0 +1,2 @@ +Reduce import time of :mod:`pstats` and :mod:`zipfile` by up to 20%, by +removing unnecessary imports to :mod:`typing`. Patch by Bénédikt Tran.