PSR-6 & Symfony Cache : de la perf en standard

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PSR-6 & Symfony Cache de la perf en standard #PHPTour @nicolasgrekas joind.in/17700

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@nicolasgrekas #PHPTour

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#PHPTour joind.in/17700 @nicolasgrekas

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#PHPTour joind.in/17700 @nicolasgrekas

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#PHPTour joind.in/17700 @nicolasgrekas

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PSR-6 Caching Interface Draft: Sept. 2013 Final: Dec. 2015

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#PHPTour joind.in/17700 @nicolasgrekas • A common interface for basic and intermediate-level caching needs. • Allow for multiple independent extensions without collision. PSR-6 Goals

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#PHPTour joind.in/17700 @nicolasgrekas • Architectural compatibility with all existing cache implementations. • Advanced caching features such as namespacing or tagging. PSR-6 Non-Goals

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#PHPTour joind.in/17700 @nicolasgrekas • doctrine/cache 16.8M • sonata-project/cache 1.3M • zendframework/zend-cache 1.1M • illuminate/cache 0.5M • tedivm/stash 0.4M PSR-6 Prior-art on Packagist

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#PHPTour joind.in/17700 @nicolasgrekas PSR-6 Concerns

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#PHPTour joind.in/17700 @nicolasgrekas • Crippled with “Bylaws” • Not always representative • Strategic hijacking • Way too much noise/overhead • Mission is unclear PHP-FIG Weaknesses

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PHP-FIG Strength Standards! Let’s do with!

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#PHPTour joind.in/17700 @nicolasgrekas PSR-6 Example #1

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#PHPTour joind.in/17700 @nicolasgrekas PSR-6 Example #2

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#PHPTour joind.in/17700 @nicolasgrekas PSR-6 CacheItemPoolInterface

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#PHPTour joind.in/17700 @nicolasgrekas PSR-6 CacheItemInterface

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#PHPTour joind.in/17700 @nicolasgrekas • CacheItemInterface instances are not interoperable • Restricted characters for keys • false as error reporting • No atomicity/transactionality PSR-6 Edge-cases

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#PHPTour joind.in/17700 @nicolasgrekas • See on Packagist https://packagist.org/providers/psr/cache-implementation • Stash PHP – stashphp.com • PHP Cache – php-cache.com • and … PSR-6 Implementations

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Welcome Symfony Cache

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#PHPTour joind.in/17700 @nicolasgrekas • Be the most powerful PHP caching library • A strict PSR-6 implementation • Following Symfony’s quality processes* • Just the bare minimum to be fast by default * Thanks "cache/integration-tests"! Symfony Cache Goals

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#PHPTour joind.in/17700 @nicolasgrekas • ApcuAdapter • ArrayAdapter • FilesystemAdapter • RedisAdapter • It’s up to you to add more Base Symfony Cache Adapters

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#PHPTour joind.in/17700 @nicolasgrekas • AbstractAdapter • ChainAdapter • DoctrineAdapter • ProxyAdapter Special Symfony Cache Adapters

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#PHPTour joind.in/17700 @nicolasgrekas Symfony Cache CacheItem

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#PHPTour joind.in/17700 @nicolasgrekas Symfony Cache AbstractAdapter

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#PHPTour joind.in/17700 @nicolasgrekas Doctrine 834.863 items/ms PHP Cache 313.334 items/ms Stash PHP 55.346 items/ms Symfony 533.366 items/ms Bench Symfony Cache

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#PHPTour joind.in/17700 @nicolasgrekas Doctrine 705.999 items/ms PHP Cache 362.477 items/ms Stash PHP 153.803 items/ms Symfony 845.910 items/ms Bench Symfony Cache

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Symfony Framework Wiring

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#PHPTour joind.in/17700 @nicolasgrekas Symfony Framework Concepts Front 1 - APCu Front 2 - APCu Redis Pool 1: Annotations Pool 2: Validation Pool 3: SQL results Pool 4: API responses

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#PHPTour joind.in/17700 @nicolasgrekas • Two core cache pool services: o cache.app for you • Defaults to filesystem, change it to Redis o cache.system derived for Symfony • Defaults to APCu+filesystem chain Symfony Framework

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#PHPTour joind.in/17700 @nicolasgrekas Symfony Framework Services

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#PHPTour joind.in/17700 @nicolasgrekas Symfony Framework Config

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#PHPTour joind.in/17700 @nicolasgrekas Symfony Framework Services

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#PHPTour joind.in/17700 @nicolasgrekas Symfony Framework Services

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#PHPTour joind.in/17700 @nicolasgrekas Symfony Framework Services

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What’s next?

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#PHPTour joind.in/17700 @nicolasgrekas • Cache warming-up o Regeneration Before Expiration o Desynchronized Cache Misses o Stampede Protection Beyond PSR-6

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#PHPTour joind.in/17700 @nicolasgrekas • Cache invalidation o Hierarchy o Tagging Beyond PSR-6

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#PHPTour joind.in/17700 @nicolasgrekas • Warm-up Validator, Serializer, etc. • $cache->invalidate($tags); • Serve stale items while refreshing? • Add a profiler panel with hits/misses? • Deprecate current way of caching • Borrow more ideas from Drupal? Symfony 3.2?

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“There are only two hard things in Computer Science: cache invalidation and naming things.” -- Phil Karlton

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Merci ! #PHPTour @nicolasgrekas joind.in/17700