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gh-118761: Improve import time for pstats and zipfile (#128981)

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Importing `pstats` or `zipfile` is now roughly 20% faster.

This is achieved by removing type annotations depending on `typing`.
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Bénédikt Tran 2025-01-23 15:49:36 +01:00 • committed by GitHub
parent ab353b31bb
commit a95dca7b98
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3 changed files with 4 additions and 4 deletions
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3
Lib/pstats.py
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@ -29,7 +29,6 @@ import re
from enum import StrEnum, _simple_enum from enum import StrEnum, _simple_enum
from functools import cmp_to_key from functools import cmp_to_key
from dataclasses import dataclass from dataclasses import dataclass
from typing import Dict
__all__ = ["Stats", "SortKey", "FunctionProfile", "StatsProfile"] __all__ = ["Stats", "SortKey", "FunctionProfile", "StatsProfile"]
@ -69,7 +68,7 @@ class FunctionProfile:
class StatsProfile: class StatsProfile:
'''Class for keeping track of an item in inventory.''' '''Class for keeping track of an item in inventory.'''
total_tt: float total_tt: float
func_profiles: Dict[str, FunctionProfile] func_profiles: dict[str, FunctionProfile]
class Stats: class Stats:
"""This class is used for creating reports from data generated by the """This class is used for creating reports from data generated by the

3
Lib/zipfile/__init__.py
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@ -13,7 +13,6 @@ import struct
import sys import sys
import threading import threading
import time import time
from typing import Self
try: try:
import zlib # We may need its compression method import zlib # We may need its compression method
@ -606,7 +605,7 @@ class ZipInfo:
return zinfo return zinfo
def _for_archive(self, archive: ZipFile) -> Self: def _for_archive(self, archive):
"""Resolve suitable defaults from the archive. """Resolve suitable defaults from the archive.
Resolve the date_time, compression attributes, and external attributes Resolve the date_time, compression attributes, and external attributes

2
Misc/NEWS.d/next/Library/2025-01-18-11-24-02.gh-issue-118761.G8MmxY.rst Normal file
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@ -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.