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Performance improvements for the MATCH_CLASS opcode
#138912
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gh-138912: Add dedicated opcodes for MatchClass without positional sub-patterns
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| https://github.com/python/cpython/compare/359df887e1c974a58d605c09b9f574a5c621459b..e0c2c1eaf161502f4ac4cefaba7600e5e5b46f0a |
| November 20, 2025 10:39 | https://github.com/python/cpython/pull/138915#event-21066545091 |
| cdce8p | https://github.com/cdce8p |
| November 22, 2025 18:12 | https://github.com/python/cpython/pull/138915#commits-pushed-133f94e |
|
| https://github.com/cdce8p |
| Merge branch 'main' | https://github.com/python/cpython/pull/138915/commits/133f94e81de327cb8f15cf85041837f296bb416e |
| 133f94e | https://github.com/python/cpython/pull/138915/commits/133f94e81de327cb8f15cf85041837f296bb416e |
|
| https://github.com/cdce8p |
| Merge branch 'main' | https://github.com/python/cpython/pull/138915/commits/640b205517a221e167e7f538edd1c77ae78a237d |
| 640b205 | https://github.com/python/cpython/pull/138915/commits/640b205517a221e167e7f538edd1c77ae78a237d |
| https://github.com/eendebakpt |
| eendebakpt | https://github.com/eendebakpt |
| ZeroIntensity | https://github.com/ZeroIntensity |
| December 21, 2025 20:49 | https://github.com/python/cpython/pull/138915#event-21692504613 |
| cdce8p | https://github.com/cdce8p |
| December 21, 2025 23:28 | https://github.com/python/cpython/pull/138915#commits-pushed-9375e2b |
|
| https://github.com/cdce8p |
| Add test case for duplicate keyword attributes | https://github.com/python/cpython/pull/138915/commits/9375e2b27e27ce6ce5ca28128b0403eb894d3553 |
| 9375e2b | https://github.com/python/cpython/pull/138915/commits/9375e2b27e27ce6ce5ca28128b0403eb894d3553 |
|
| https://github.com/cdce8p |
| Merge branch 'main' | https://github.com/python/cpython/pull/138915/commits/f5eeacc42cac955acc5f6176f1fc602c16da76a7 |
| f5eeacc | https://github.com/python/cpython/pull/138915/commits/f5eeacc42cac955acc5f6176f1fc602c16da76a7 |
| https://github.com/sergey-miryanov |
| sergey-miryanov | https://github.com/sergey-miryanov |
|
Jan 24, 2026
| https://github.com/python/cpython/pull/138915#pullrequestreview-3701052603 |
|
View reviewed changes
| https://github.com/python/cpython/pull/138915/files/8d6e0995c012a7bc361810b5712a63dbea341e8d |
| sergey-miryanov | https://github.com/sergey-miryanov |
| https://github.com/python/cpython/pull/138915#pullrequestreview-3701052603 |
| Learn more | https://docs.github.com/articles/managing-disruptive-comments/#hiding-a-comment |
| Please reload this page | https://github.com/python/cpython/pull/138915 |
| cdce8p | https://github.com/cdce8p |
| January 24, 2026 10:29 | https://github.com/python/cpython/pull/138915#commits-pushed-fd7baee |
|
| https://github.com/cdce8p |
| Merge branch 'main' | https://github.com/python/cpython/pull/138915/commits/fd7baee8b656a790ff799b28e55e8a2c93b9f185 |
| fd7baee | https://github.com/python/cpython/pull/138915/commits/fd7baee8b656a790ff799b28e55e8a2c93b9f185 |
|
| https://github.com/cdce8p |
| Merge branch 'main' | https://github.com/python/cpython/pull/138915/commits/8d6e0995c012a7bc361810b5712a63dbea341e8d |
| 8d6e099 | https://github.com/python/cpython/pull/138915/commits/8d6e0995c012a7bc361810b5712a63dbea341e8d |
| https://github.com/gpshead |
| gpshead | https://github.com/gpshead |
|
Feb 14, 2026
| https://github.com/python/cpython/pull/138915#pullrequestreview-3800920228 |
|
View reviewed changes
| https://github.com/python/cpython/pull/138915/files/8d6e0995c012a7bc361810b5712a63dbea341e8d |
| gpshead | https://github.com/gpshead |
| https://github.com/python/cpython/pull/138915#pullrequestreview-3800920228 |
| Learn more | https://docs.github.com/articles/managing-disruptive-comments/#hiding-a-comment |
| Please reload this page | https://github.com/python/cpython/pull/138915 |
| https://github.com/apps/bedevere-app |
| bedevere-app | https://github.com/apps/bedevere-app |
|
awaiting merge
| https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22awaiting%20merge%22 |
|
awaiting core review
| https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22awaiting%20core%20review%22 |
| Feb 14, 2026 | https://github.com/python/cpython/pull/138915#event-22785428323 |
| https://github.com/gpshead |
| gpshead | https://github.com/gpshead |
|
performance
| https://github.com/python/cpython/issues?q=state%3Aopen%20label%3Aperformance |
| Feb 14, 2026 | https://github.com/python/cpython/pull/138915#event-22785430581 |
| https://github.com/gpshead |
| gpshead | https://github.com/gpshead |
| 75d4839 | https://github.com/python/cpython/commit/75d4839fa9069241ca9c3ee45ad8369ef9777500 |
| Feb 14, 2026 | https://github.com/python/cpython/pull/138915#event-22785448811 |
| Please reload this page | https://github.com/python/cpython/pull/138915 |
| https://github.com/apps/bedevere-app |
| bedevere-app | https://github.com/apps/bedevere-app |
|
awaiting merge
| https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22awaiting%20merge%22 |
| Feb 14, 2026 | https://github.com/python/cpython/pull/138915#event-22785449545 |
| https://github.com/cdce8p |
| cdce8p | https://github.com/cdce8p |
| February 14, 2026 09:59 | https://github.com/python/cpython/pull/138915#event-22788552507 |
| https://github.com/cdce8p |
| cdce8p | https://github.com/cdce8p |
| Feb 14, 2026 | https://github.com/python/cpython/pull/138915#issuecomment-3901617174 |
| @gpshead | https://github.com/gpshead |
| Please reload this page | https://github.com/python/cpython/pull/138915 |
| https://github.com/gpshead |
| gpshead | https://github.com/gpshead |
| Feb 16, 2026 | https://github.com/python/cpython/pull/138915#issuecomment-3906835291 |
| Please reload this page | https://github.com/python/cpython/pull/138915 |
| https://github.com/cdce8p |
| cdce8p | https://github.com/cdce8p |
|
Feb 27, 2026
| https://github.com/python/cpython/pull/138915#ref-pullrequest-3941637812 |
|
gh-138912: Add fast path for match class patterns without sub-patterns
#144820
| https://github.com/python/cpython/pull/144820 |
| brijkapadia | https://github.com/brijkapadia |
|
Feb 28, 2026
| https://github.com/python/cpython/pull/138915#ref-commit-a12a0e0 |
|
| https://github.com/cdce8p |
|
| https://github.com/brijkapadia |
| pythongh-138912 | https://github.com/python/cpython/issues/138912 |
| : Improve MATCH_CLASS opcode performance ( | https://github.com/brijkapadia/cpython/commit/a12a0e02bafc6ffed1a38fe4d5707c45b2d12986 |
| pythonGH-138915 | https://github.com/python/cpython/pull/138915 |
| a12a0e0 | https://github.com/brijkapadia/cpython/commit/a12a0e02bafc6ffed1a38fe4d5707c45b2d12986 |
| https://github.com/python/cpython/pull/138915 |
| ljfp | https://github.com/ljfp |
|
Apr 25, 2026
| https://github.com/python/cpython/pull/138915#ref-commit-19e3278 |
|
| https://github.com/cdce8p |
|
| https://github.com/ljfp |
| pythongh-138912 | https://github.com/python/cpython/issues/138912 |
| : Improve MATCH_CLASS opcode performance ( | https://github.com/ljfp/cpython/commit/19e3278d9c2e4da08a87bd6bbd96ffdaad2aaea7 |
| pythonGH-138915 | https://github.com/python/cpython/pull/138915 |
| 19e3278 | https://github.com/ljfp/cpython/commit/19e3278d9c2e4da08a87bd6bbd96ffdaad2aaea7 |
| https://github.com/python/cpython/pull/138915 |
| https://github.com/eendebakpt |
| eendebakpt | https://github.com/eendebakpt |
|
Apr 28, 2026
| https://github.com/python/cpython/pull/138915#ref-issue-1238048738 |
|
Performance gap of match statements of classes compared with equivalent Python 3.9 code
#92868
| https://github.com/python/cpython/issues/92868 |
| https://github.co/hiddenchars |
| https://github.com/python/cpython/pull/{{ revealButtonHref }} |
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| https://github.com/sergey-miryanov |
|
sergey-miryanov
| https://github.com/sergey-miryanov |
|
| https://github.com/python/cpython/pull/138915/files/8d6e0995c012a7bc361810b5712a63dbea341e8d |
|
| https://github.com/gpshead |
|
gpshead
| https://github.com/gpshead |
|
| https://github.com/python/cpython/pull/138915/files/8d6e0995c012a7bc361810b5712a63dbea341e8d |
|
| https://github.com/eendebakpt |
|
eendebakpt
| https://github.com/eendebakpt |
|
| https://github.com/python/cpython/pull/138915/files/b4686477ceb31972a6a53077162726a14760a09b |
|
| https://github.com/markshannon |
|
markshannon
| https://github.com/markshannon |
|
| https://github.com/ZeroIntensity |
|
ZeroIntensity
| https://github.com/ZeroIntensity |
|
performance
| https://github.com/python/cpython/issues?q=state%3Aopen%20label%3Aperformance |
| Please reload this page | https://github.com/python/cpython/pull/138915 |
|
| https://github.com/cdce8p |
|
| https://github.com/eendebakpt |
|
| https://github.com/gpshead |
|
| https://github.com/sergey-miryanov |
|
| https://github.com/ZeroIntensity |
|
| https://github.com/nazeerali4325-commits |
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