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gh-156955: Speed up csv.writer by caching the set of special characters #209236

gh-156955: Speed up csv.writer by caching the set of special characters

gh-156955: Speed up csv.writer by caching the set of special characters #209236

Triggered via pull request September 13, 2026 07:47
Status Cancelled
Total duration 12m 47s
Artifacts 2

build.yml

on: pull_request
Change detection  /  Create context from changed files
11s
Change detection / Create context from changed files
Matrix: Address sanitizer
Matrix: build-macos
Matrix: build-san
Matrix: Ubuntu SSL tests
Matrix: build-ubuntu
Matrix: build-windows
Matrix: cifuzz
Docs  /  Doctest
7m 47s
Docs / Doctest
Docs  /  Check EPUB
2m 22s
Docs / Check EPUB
Check if Autoconf files are up to date
30s
Check if Autoconf files are up to date
Check if generated files are up to date
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Check if generated files are up to date
C API Docs  /  Check if all C APIs are documented
11s
C API Docs / Check if all C APIs are documented
Ubuntu (installed)  /  build, install and test
6m 51s
Ubuntu (installed) / build, install and test
iOS
12m 15s
iOS
Emscripten  /  build and test
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Emscripten / build and test
WASI  /  build and test
5m 27s
WASI / build and test
Hypothesis tests on Ubuntu
10m 2s
Hypothesis tests on Ubuntu
Cross build Linux
4m 48s
Cross build Linux
Matrix: build-android
Docs  /  ...  /  Check for removed HTML IDs
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81 errors, 7 warnings, and 2 notices
Docs / Docs
Process completed with exit code 2.
Docs / Docs
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Docs / Check EPUB
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CIFuzz / cpython3 (memory)
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CIFuzz / cpython3 (address)
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CIFuzz / cpython3 (undefined)
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CIFuzz / cpython3 (undefined)
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CIFuzz / cpython3 (undefined)
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CIFuzz / python3-libraries (address)
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Windows (free-threading) / Build and test (x64, tail-call)
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Windows / Build and test (x64, switch-case)
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Windows / Build and test (x64, switch-case)
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Windows / Build and test (x64, tail-call)
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Windows / Build and test (x64, tail-call)
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Windows / Build and test (Win32, switch-case)
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Windows / Build and test (Win32, switch-case)
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Address sanitizer (ubuntu-26.04)
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Address sanitizer (ubuntu-26.04)
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Emscripten / build and test
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Emscripten / build and test
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Windows (free-threading) / Build and test (arm64, switch-case)
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Windows (free-threading) / Build and test (arm64, switch-case)
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Windows / Build and test (arm64, switch-case)
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Windows / Build and test (arm64, switch-case)
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Ubuntu / build and test (ubuntu-26.04)
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Ubuntu / build and test (ubuntu-26.04)
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Ubuntu / build and test (ubuntu-26.04-arm)
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Ubuntu / build and test (ubuntu-26.04-arm)
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Android (x86_64)
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Android (x86_64)
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Ubuntu (free-threading) / build and test (ubuntu-26.04)
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Ubuntu (free-threading) / build and test (ubuntu-26.04)
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Sanitizers / UBSan
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Sanitizers / UBSan
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Ubuntu (bolt) / build and test (ubuntu-26.04)
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Ubuntu (bolt) / build and test (ubuntu-26.04)
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Sanitizers / TSan (free-threading)
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macOS / build and test (macos-26)
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macOS / build and test (macos-26)
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macOS / build and test (macos-26-intel)
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macOS (free-threading) / build and test (macos-26)
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macOS (free-threading) / build and test (macos-26)
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iOS
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iOS
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All required checks pass
Process completed with exit code 1.
Tests
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Tests
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Tests
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Tests
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Tests
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Tests
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Tests
Canceling since a higher priority waiting request for Tests-serhiy-storchaka-csv-writer-special-bitmap exists
Tests
Canceling since a higher priority waiting request for Tests-serhiy-storchaka-csv-writer-special-bitmap exists
Tests
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Tests
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Tests
Canceling since a higher priority waiting request for Tests-serhiy-storchaka-csv-writer-special-bitmap exists
Tests
Canceling since a higher priority waiting request for Tests-serhiy-storchaka-csv-writer-special-bitmap exists
Tests
Canceling since a higher priority waiting request for Tests-serhiy-storchaka-csv-writer-special-bitmap exists
Tests
Canceling since a higher priority waiting request for Tests-serhiy-storchaka-csv-writer-special-bitmap exists
Tests
Canceling since a higher priority waiting request for Tests-serhiy-storchaka-csv-writer-special-bitmap exists
Tests
Canceling since a higher priority waiting request for Tests-serhiy-storchaka-csv-writer-special-bitmap exists
Tests
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Tests
Canceling since a higher priority waiting request for Tests-serhiy-storchaka-csv-writer-special-bitmap exists
Tests
Canceling since a higher priority waiting request for Tests-serhiy-storchaka-csv-writer-special-bitmap exists
Tests
Canceling since a higher priority waiting request for Tests-serhiy-storchaka-csv-writer-special-bitmap exists
Tests
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Tests
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Tests
Canceling since a higher priority waiting request for Tests-serhiy-storchaka-csv-writer-special-bitmap exists
Cross build Linux: Parser/lexer/string.c#L81
variable ‘previous_end’ set but not used [-Wunused-but-set-variable]
Ubuntu (installed) / build, install and test: Parser/lexer/string.c#L81
variable ‘previous_end’ set but not used [-Wunused-but-set-variable]
Hypothesis tests on Ubuntu
No files were found with the provided path: /home/runner/work/cpython/cpython-builddir/.hypothesis/examples/. No artifacts will be uploaded.
Address sanitizer (ubuntu-26.04): Parser/lexer/string.c#L81
variable ‘previous_end’ set but not used [-Wunused-but-set-variable]
macOS / build and test (macos-26)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
macOS / build and test (macos-26-intel)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
macOS (free-threading) / build and test (macos-26)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
Windows (free-threading) / Build and test (arm64, switch-case)
"The windows-11-arm label will migrate to use Visual Studio 2026 by default beginning September 21, 2026. For more information see https://github.com/actions/runner-images/issues/14602"
Windows / Build and test (arm64, switch-case)
"The windows-11-arm label will migrate to use Visual Studio 2026 by default beginning September 21, 2026. For more information see https://github.com/actions/runner-images/issues/14602"

Artifacts

Produced during runtime
Name Size Digest
TSan-logs-default
2.05 KB
sha256:c5c3c64e3e987771814e4b73c816bfe5b21b80be33af45512fc4f6156e4062a2
UBSan-logs-default
365 Bytes
sha256:534bb1f8710662bfee1011fad6d2c7c53f0d81c3adbbf865b468effca60755cc