Faster ClassNameHelper #3994
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Faster ClassNameHelper #3994
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mvorisek
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May 16, 2025
| return Strings::match(ltrim($name, '\\'), '/^[a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff]*(\\\\[a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff]*)*$/') !== null; | ||
| if (!array_key_exists($name, self::$checked)) { | ||
| // from https://stackoverflow.com/questions/3195614/validate-class-method-names-with-regex#comment104531582_12011255 | ||
| self::$checked[$name] = Strings::match(ltrim($name, '\\'), '/^[a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff]*(\\\\[a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff]*)*$/') !== null; |
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How much faster https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/blob/v3.75.0/src/DocBlock/TypeExpression.php#L177-L179 this regex is using native preg_match directly?
Regexes are usually fast.
(...*)* in theory can be very slow compared to (...*+)*.
Also the trim can be easily integrated into the regex (and as the linked PHP CS Fixer already does).
And the main slowdown seems to be comming from Nette. As long as the regex is valid, no need to check for anything else than the return value. This is what PHPStan already checks and check well.
|
Awesome, thank you! |
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70% faster edge case in
vendor/bin/phpunit tests/PHPStan/Analyser/AnalyserIntegrationTest.php --filter testBug10979- which is currently the slowestAnalyserIntegrationTestin the repo.Before this PR
After this PR
Profile before the PR
triggered on
IntersectionType->getFiniteTypes()