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bpo-42160: reduce overhead in tempfile #22997

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merged 9 commits into from Oct 30, 2020
Merged

bpo-42160: reduce overhead in tempfile #22997

merged 9 commits into from Oct 30, 2020

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Deric-W
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@Deric-W Deric-W commented Oct 27, 2020 •
edited by bedevere-bot

  • replace pid check in _RandomNameSequence with os.register_at_fork
  • add variants property to allow replacing TMP_MAX with a calculated value
  • fix small typo in test_tempfile

https://bugs.python.org/issue42160

Deric-W added 2 commits Oct 26, 2020
@Deric-W
bpo-42160: reduce overhead in tempfile
f10516b 
The _RandomSequence class in tempfile used to check the current pid every time its rng property was used.
This commit replaces this code with os.register_at_fork to reduce the overhead.
@Deric-W
Merge branch 'master' of github.com:python/cpython into tempfile-over…
9a77aee 
…head
methane
methane reviewed Oct 29, 2020
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methane
methane reviewed Oct 29, 2020
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@methane methane merged commit 8e409ce into python:master Oct 30, 2020
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@Deric-W Deric-W deleted the tempfile-overhead branch Oct 30, 2020
methane added a commit that referenced this pull request Oct 31, 2020
@methane
Revert "bpo-42160: tempfile: Reduce overhead of pid check. (GH-22997)"
9198cc5 
This reverts commit 8e409ce.
@methane methane mentioned this pull request Oct 31, 2020
Merged
methane added a commit that referenced this pull request Oct 31, 2020
@methane
Revert "bpo-42160: tempfile: Reduce overhead of pid check. (GH-22997)"
43ca084 
`_RandomNameSequence` is not true singleton so using `os.register_at_fork` doesn't make sense unlike `random._inst`.

This reverts commit 8e409ce.
@methane methane mentioned this pull request Nov 1, 2020
Merged
adorilson pushed a commit to adorilson/cpython that referenced this pull request Mar 13, 2021
@Deric-W @adorilson
bpo-42160: tempfile: Reduce overhead of pid check. (pythonGH-22997)
07b5ace 
The _RandomSequence class in tempfile used to check the current pid every time its rng property was used.
This commit replaces this code with `os.register_at_fork` to reduce the overhead.
adorilson pushed a commit to adorilson/cpython that referenced this pull request Mar 13, 2021
@methane @adorilson
Revert "bpo-42160: tempfile: Reduce overhead of pid check. (pythonGH-…
efe9810 
…22997)"

`_RandomNameSequence` is not true singleton so using `os.register_at_fork` doesn't make sense unlike `random._inst`.

This reverts commit 8e409ce.
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