This PR was merged into the 2.3 branch.
Discussion
----------
[Finder] Optimize the hot-path
| Q | A
| ------------- | ---
| Bug fix? | yes
| New feature? | no
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | #15824
| License | MIT
| Doc PR | -
A significant part of the perf gain in #15802 was related to filters not being applied recursively...
#15824 fixing this, performance dropped again.
This PR optimizes the hot path by replacing a regexp test by a simple `isset` when possible.
Blackfire diff after #15824 is the following:
https://blackfire.io/profiles/compare/9e489018-998d-4acb-92a0-46011828e83b/graph
`preg_match` is not called anymore, and `Symfony\Component\Finder\Iterator\RecursiveDirectoryIterator::current()` is also cut by two.
When this `isset` optimization is disabled and replaced by a concatenation of all the regexps patterns in a single bigger one, the gain is still significant but lower:
https://blackfire.io/profiles/compare/db86b80e-b63e-4fc9-9ff3-9ed32baeb948/graph
This makes me think that an other and last round of optimization is possible by merging all regexps in one in MultiplePcreFilterIterator filters. If someone wants to work on this, please do it :)
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src/Symfony | ||
.editorconfig | ||
.gitignore | ||
.php_cs | ||
.travis.php | ||
.travis.yml | ||
CHANGELOG-2.2.md | ||
CHANGELOG-2.3.md | ||
CONTRIBUTING.md | ||
CONTRIBUTORS.md | ||
LICENSE | ||
README.md | ||
UPGRADE-2.1.md | ||
UPGRADE-2.2.md | ||
UPGRADE-2.3.md | ||
UPGRADE-3.0.md | ||
appveyor.yml | ||
composer.json | ||
phpunit | ||
phpunit.xml.dist |
README.md
README
What is Symfony?
Symfony is a PHP 5.3 full-stack web framework. It is written with speed and flexibility in mind. It allows developers to build better and easy to maintain websites with PHP.
Symfony can be used to develop all kind of websites, from your personal blog to high traffic ones like Dailymotion or Yahoo! Answers.
Requirements
Symfony is only supported on PHP 5.3.3 and up.
Be warned that PHP versions before 5.3.8 are known to be buggy and might not work for you:
-
before PHP 5.3.4, if you get "Notice: Trying to get property of non-object", you've hit a known PHP bug (see https://bugs.php.net/bug.php?id=52083 and https://bugs.php.net/bug.php?id=50027);
-
before PHP 5.3.8, if you get an error involving annotations, you've hit a known PHP bug (see https://bugs.php.net/bug.php?id=55156).
-
PHP 5.3.16 has a major bug in the Reflection subsystem and is not suitable to run Symfony (https://bugs.php.net/bug.php?id=62715)
Installation
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Documentation
The "Quick Tour" tutorial gives you a first feeling of the framework. If, like us, you think that Symfony can help speed up your development and take the quality of your work to the next level, read the official Symfony documentation.
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