feature #36195 [DI] add tags container.preload/.no_preload to declare extra classes to preload/services to not preload (nicolas-grekas)

This PR was merged into the 5.1-dev branch.

Discussion
----------

[DI] add tags `container.preload`/`.no_preload` to declare extra classes to preload/services to not preload

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -

To allow fine-grained declaration of sidekick classes in DI extensions.
Follows #36103

Commits
-------

fb04711b40 [DI] add tags `container.preload`/`.no_preload` to declare extra classes to preload/services to not preload

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/UnusedTagsPass.php

@@ -32,6 +32,8 @@ class UnusedTagsPass implements CompilerPassInterface
         'container.env_var_loader',
         'container.env_var_processor',
         'container.hot_path',
+        'container.no_preload',
+        'container.preload',
         'container.reversible',
         'container.service_locator',
         'container.service_locator_context',

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php

@@ -434,7 +434,8 @@ class FrameworkExtension extends Extension
         $container->registerForAutoconfiguration(CacheClearerInterface::class)
             ->addTag('kernel.cache_clearer');
         $container->registerForAutoconfiguration(CacheWarmerInterface::class)
-            ->addTag('kernel.cache_warmer');
+            ->addTag('kernel.cache_warmer')
+            ->addTag('container.no_preload');
         $container->registerForAutoconfiguration(EventSubscriberInterface::class)
             ->addTag('kernel.event_subscriber');
         $container->registerForAutoconfiguration(LocaleAwareInterface::class)

src/Symfony/Bundle/FrameworkBundle/Resources/config/annotations.xml

@@ -34,6 +34,7 @@
         </service>
 
         <service id="annotations.cache_warmer" class="Symfony\Bundle\FrameworkBundle\CacheWarmer\AnnotationsCacheWarmer">
+            <tag name="container.no_preload" />
             <argument type="service" id="annotations.reader" />
             <argument>%kernel.cache_dir%/annotations.php</argument>
             <argument>#^Symfony\\(?:Component\\HttpKernel\\|Bundle\\FrameworkBundle\\Controller\\(?!.*Controller$))#</argument>

src/Symfony/Bundle/FrameworkBundle/Resources/config/cache_debug.xml

@@ -20,6 +20,7 @@
                 <argument>cache.serializer</argument>
             </argument>
             <tag name="kernel.cache_warmer" priority="64" />
+            <tag name="container.no_preload" />
         </service>
     </services>
 </container>

src/Symfony/Bundle/FrameworkBundle/Resources/config/console.xml

@@ -11,10 +11,12 @@
             <argument type="service" id="logger" on-invalid="null" />
             <tag name="kernel.event_subscriber" />
             <tag name="monolog.logger" channel="console" />
+            <tag name="container.no_preload" />
         </service>
 
         <service id="console.suggest_missing_package_subscriber" class="Symfony\Bundle\FrameworkBundle\EventListener\SuggestMissingPackageSubscriber">
             <tag name="kernel.event_subscriber" />
+            <tag name="container.no_preload" />
         </service>
 
         <service id="console.command.about" class="Symfony\Bundle\FrameworkBundle\Command\AboutCommand">

src/Symfony/Bundle/FrameworkBundle/Resources/config/routing.xml

@@ -101,6 +101,7 @@
         <service id="router.cache_warmer" class="Symfony\Bundle\FrameworkBundle\CacheWarmer\RouterCacheWarmer">
             <tag name="container.service_subscriber" id="router" />
             <tag name="kernel.cache_warmer" />
+            <tag name="container.no_preload" />
             <argument type="service" id="Psr\Container\ContainerInterface" />
         </service>
 

src/Symfony/Bundle/FrameworkBundle/Resources/config/serializer.xml

@@ -107,6 +107,7 @@
             <argument type="collection" /><!-- Loaders injected by the extension -->
             <argument>%serializer.mapping.cache.file%</argument>
             <tag name="kernel.cache_warmer" />
+            <tag name="container.no_preload" />
         </service>
 
         <service id="serializer.mapping.cache.symfony" class="Psr\Cache\CacheItemPoolInterface">

src/Symfony/Bundle/FrameworkBundle/Resources/config/services.xml

@@ -66,6 +66,7 @@
         <service id="Symfony\Component\HttpFoundation\UrlHelper" alias="url_helper" />
 
         <service id="cache_warmer" class="Symfony\Component\HttpKernel\CacheWarmer\CacheWarmerAggregate" public="true">
+            <tag name="container.no_preload" />
             <argument type="tagged_iterator" tag="kernel.cache_warmer" />
             <argument>%kernel.debug%</argument>
             <argument>%kernel.cache_dir%/%kernel.container_class%Deprecations.log</argument>

src/Symfony/Bundle/FrameworkBundle/Resources/config/translation.xml

@@ -139,6 +139,7 @@
         <service id="translation.warmer" class="Symfony\Bundle\FrameworkBundle\CacheWarmer\TranslationsCacheWarmer">
             <tag name="container.service_subscriber" id="translator" />
             <tag name="kernel.cache_warmer" />
+            <tag name="container.no_preload" />
             <argument type="service" id="Psr\Container\ContainerInterface" />
         </service>
     </services>

src/Symfony/Bundle/FrameworkBundle/Resources/config/validator.xml

@@ -36,6 +36,7 @@
             <argument type="service" id="validator.builder" />
             <argument>%validator.mapping.cache.file%</argument>
             <tag name="kernel.cache_warmer" />
+            <tag name="container.no_preload" />
         </service>
 
         <service id="validator.mapping.cache.adapter" class="Symfony\Component\Cache\Adapter\PhpArrayAdapter">

src/Symfony/Bundle/SecurityBundle/Resources/config/security.xml

@@ -222,6 +222,7 @@
         <!-- Cache Warmers -->
         <service id="security.cache_warmer.expression" class="Symfony\Bundle\SecurityBundle\CacheWarmer\ExpressionCacheWarmer">
             <tag name="kernel.cache_warmer" />
+            <tag name="container.no_preload" />
             <argument type="collection" /> <!-- expressions -->
             <argument type="service" id="security.expression_language" />
         </service>

src/Symfony/Bundle/TwigBundle/Resources/config/twig.xml

@@ -18,6 +18,14 @@
                 <argument type="service" id="twig.runtime_loader" />
             </call>
             <configurator service="twig.configurator.environment" method="configure" />
+            <tag name="container.preload" class="Twig\Cache\FilesystemCache" />
+            <tag name="container.preload" class="Twig\Extension\CoreExtension" />
+            <tag name="container.preload" class="Twig\Extension\EscaperExtension" />
+            <tag name="container.preload" class="Twig\Extension\OptimizerExtension" />
+            <tag name="container.preload" class="Twig\Extension\StagingExtension" />
+            <tag name="container.preload" class="Twig\ExtensionSet" />
+            <tag name="container.preload" class="Twig\Template" />
+            <tag name="container.preload" class="Twig\TemplateWrapper" />
         </service>
         <service id="Twig_Environment" alias="twig" />
         <service id="Twig\Environment" alias="twig" />
@@ -37,6 +45,7 @@
 
         <service id="twig.template_cache_warmer" class="Symfony\Bundle\TwigBundle\CacheWarmer\TemplateCacheWarmer">
             <tag name="kernel.cache_warmer" />
+            <tag name="container.no_preload" />
             <tag name="container.service_subscriber" id="twig" />
             <argument type="service" id="Psr\Container\ContainerInterface" />
             <argument type="service" id="twig.template_iterator" />

src/Symfony/Bundle/TwigBundle/TwigBundle.php

@@ -19,20 +19,6 @@ use Symfony\Component\Console\Application;
 use Symfony\Component\DependencyInjection\Compiler\PassConfig;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\HttpKernel\Bundle\Bundle;
-use Twig\Cache\FilesystemCache;
-use Twig\Extension\CoreExtension;
-use Twig\Extension\EscaperExtension;
-use Twig\Extension\OptimizerExtension;
-use Twig\Extension\StagingExtension;
-use Twig\ExtensionSet;
-
-// Help opcache.preload discover always-needed symbols
-class_exists(FilesystemCache::class);
-class_exists(CoreExtension::class);
-class_exists(EscaperExtension::class);
-class_exists(OptimizerExtension::class);
-class_exists(StagingExtension::class);
-class_exists(ExtensionSet::class);
 
 /**
  * Bundle.

src/Symfony/Component/Console/DependencyInjection/AddConsoleCommandPass.php

@@ -28,11 +28,13 @@ class AddConsoleCommandPass implements CompilerPassInterface
 {
     private $commandLoaderServiceId;
     private $commandTag;
+    private $noPreloadTag;
 
-    public function __construct(string $commandLoaderServiceId = 'console.command_loader', string $commandTag = 'console.command')
+    public function __construct(string $commandLoaderServiceId = 'console.command_loader', string $commandTag = 'console.command', string $noPreloadTag = 'container.no_preload')
     {
         $this->commandLoaderServiceId = $commandLoaderServiceId;
         $this->commandTag = $commandTag;
+        $this->noPreloadTag = $noPreloadTag;
     }
 
     public function process(ContainerBuilder $container)
@@ -44,6 +46,7 @@ class AddConsoleCommandPass implements CompilerPassInterface
 
         foreach ($commandServices as $id => $tags) {
             $definition = $container->getDefinition($id);
+            $definition->addTag($this->noPreloadTag);
             $class = $container->getParameterBag()->resolveValue($definition->getClass());
 
             if (isset($tags[0]['command'])) {
@@ -91,6 +94,7 @@ class AddConsoleCommandPass implements CompilerPassInterface
         $container
             ->register($this->commandLoaderServiceId, ContainerCommandLoader::class)
             ->setPublic(true)
+            ->addTag($this->noPreloadTag)
             ->setArguments([ServiceLocatorTagPass::register($container, $lazyCommandRefs), $lazyCommandMap]);
 
         $container->setParameter('console.command.ids', $serviceIds);

src/Symfony/Component/DependencyInjection/CHANGELOG.md

@@ -13,6 +13,7 @@ CHANGELOG
  * deprecated the `Psr\Container\ContainerInterface` and `Symfony\Component\DependencyInjection\ContainerInterface` aliases of the `service_container` service,
    configure them explicitly instead
  * added class `Symfony\Component\DependencyInjection\Dumper\Preloader` to help with preloading on PHP 7.4+
+ * added tags `container.preload`/`.no_preload` to declare extra classes to preload/services to not preload
 
 5.0.0
 -----

src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php

@@ -78,6 +78,7 @@ class PhpDumper extends Dumper
     private $namespace;
     private $asFiles;
     private $hotPathTag;
+    private $preloadTags;
     private $inlineFactories;
     private $inlineRequires;
     private $inlinedRequires = [];
@@ -143,6 +144,7 @@ class PhpDumper extends Dumper
             'as_files' => false,
             'debug' => true,
             'hot_path_tag' => 'container.hot_path',
+            'preload_tags' => ['container.preload', 'container.no_preload'],
             'inline_factories_parameter' => 'container.dumper.inline_factories',
             'inline_class_loader_parameter' => 'container.dumper.inline_class_loader',
             'preload_classes' => [],
@@ -154,6 +156,7 @@ class PhpDumper extends Dumper
         $this->namespace = $options['namespace'];
         $this->asFiles = $options['as_files'];
         $this->hotPathTag = $options['hot_path_tag'];
+        $this->preloadTags = $options['preload_tags'];
         $this->inlineFactories = $this->asFiles && $options['inline_factories_parameter'] && (!$this->container->hasParameter($options['inline_factories_parameter']) || $this->container->getParameter($options['inline_factories_parameter']));
         $this->inlineRequires = $options['inline_class_loader_parameter'] && ($this->container->hasParameter($options['inline_class_loader_parameter']) ? $this->container->getParameter($options['inline_class_loader_parameter']) : (\PHP_VERSION_ID < 70400 || $options['debug']));
         $this->serviceLocatorTag = $options['service_locator_tag'];
@@ -571,7 +574,7 @@ EOF;
             $lineage = [];
             foreach ($this->inlinedDefinitions as $def) {
                 if (!$def->isDeprecated()) {
-                    foreach ($this->getClasses($def) as $class) {
+                    foreach ($this->getClasses($def, $cId) as $class) {
                         $this->collectLineage($class, $lineage);
                     }
                 }
@@ -583,7 +586,7 @@ EOF;
                     && $this->container->has($id)
                     && $this->isTrivialInstance($def = $this->container->findDefinition($id))
                 ) {
-                    foreach ($this->getClasses($def) as $class) {
+                    foreach ($this->getClasses($def, $cId) as $class) {
                         $this->collectLineage($class, $lineage);
                     }
                 }
@@ -838,9 +841,9 @@ EOF;
             if ($definition->isDeprecated()) {
                 $deprecation = $definition->getDeprecation($id);
                 $code .= sprintf("        trigger_deprecation(%s, %s, %s);\n\n", $this->export($deprecation['package']), $this->export($deprecation['version']), $this->export($deprecation['message']));
-            } else {
+            } elseif (!$definition->hasTag($this->preloadTags[1])) {
                 foreach ($this->inlinedDefinitions as $def) {
-                    foreach ($this->getClasses($def) as $class) {
+                    foreach ($this->getClasses($def, $id) as $class) {
                         $this->preload[$class] = $class;
                     }
                 }
@@ -1003,10 +1006,10 @@ EOTXT
         foreach ($definitions as $id => $definition) {
             if (!$definition->isSynthetic()) {
                 $services[$id] = $this->addService($id, $definition);
-            } else {
+            } elseif (!$definition->hasTag($this->preloadTags[1])) {
                 $services[$id] = null;
 
-                foreach ($this->getClasses($definition) as $class) {
+                foreach ($this->getClasses($definition, $id) as $class) {
                     $this->preload[$class] = $class;
                 }
             }
@@ -1385,7 +1388,7 @@ EOF;
             $inlinedDefinitions = $this->getDefinitionsFromArguments([$definition]);
 
             foreach ($inlinedDefinitions as $def) {
-                foreach ($this->getClasses($def) as $class) {
+                foreach ($this->getClasses($def, $id) as $class) {
                     $this->collectLineage($class, $lineage);
                 }
             }
@@ -2112,11 +2115,19 @@ EOF;
         return null;
     }
 
-    private function getClasses(Definition $definition): array
+    private function getClasses(Definition $definition, string $id): array
     {
         $classes = [];
 
         while ($definition instanceof Definition) {
+            foreach ($definition->getTag($this->preloadTags[0]) as $tag) {
+                if (!isset($tag['class'])) {
+                    throw new InvalidArgumentException(sprintf('Missing attribute "class" on tag "%s" for service "%s".', $this->preloadTags[0], $id));
+                }
+
+                $classes[] = trim($tag['class'], '\\');
+            }
+
             $classes[] = trim($definition->getClass(), '\\');
             $factory = $definition->getFactory();
 

src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/services9.php

@@ -134,6 +134,10 @@ return function (ContainerConfigurator $c) {
         ->args([new Reference('errored_definition', ContainerInterface::RUNTIME_EXCEPTION_ON_INVALID_REFERENCE)])
         ->public();
     $s->set('errored_definition', 'stdClass')->private();
+    $s->set('preload_sidekick', 'stdClass')
+        ->tag('container.preload', ['class' => 'Some\Sidekick1'])
+        ->tag('container.preload', ['class' => 'Some\Sidekick2'])
+        ->public();
 
     $s->alias('alias_for_foo', 'foo')->private()->public();
     $s->alias('alias_for_alias', ref('alias_for_foo'));

src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container9.php

@@ -187,4 +187,9 @@ $container->register('runtime_error', 'stdClass')
 $container->register('errored_definition', 'stdClass')
     ->addError('Service "errored_definition" is broken.');
 
+$container->register('preload_sidekick', 'stdClass')
+    ->setPublic(true)
+    ->addTag('container.preload', ['class' => 'Some\Sidekick1'])
+    ->addTag('container.preload', ['class' => 'Some\Sidekick2']);
+
 return $container;

src/Symfony/Component/DependencyInjection/Tests/Fixtures/graphviz/services9.dot

@@ -36,6 +36,7 @@ digraph sc {
   node_tagged_iterator [label="tagged_iterator\nBar\n", shape=record, fillcolor="#eeeeee", style="filled"];
   node_runtime_error [label="runtime_error\nstdClass\n", shape=record, fillcolor="#eeeeee", style="filled"];
   node_errored_definition [label="errored_definition\nstdClass\n", shape=record, fillcolor="#eeeeee", style="filled"];
+  node_preload_sidekick [label="preload_sidekick\nstdClass\n", shape=record, fillcolor="#eeeeee", style="filled"];
   node_foo2 [label="foo2\n\n", shape=record, fillcolor="#ff9999", style="filled"];
   node_foo3 [label="foo3\n\n", shape=record, fillcolor="#ff9999", style="filled"];
   node_foobaz [label="foobaz\n\n", shape=record, fillcolor="#ff9999", style="filled"];

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt

@@ -578,6 +578,29 @@ class getNonSharedFooService extends ProjectServiceContainer
     }
 }
 
+    [Container%s/getPreloadSidekickService.php] => <?php
+
+namespace Container%s;
+
+use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ * @internal This class has been auto-generated by the Symfony Dependency Injection Component.
+ */
+class getPreloadSidekickService extends ProjectServiceContainer
+{
+    /**
+     * Gets the public 'preload_sidekick' shared service.
+     *
+     * @return \stdClass
+     */
+    public static function do($container, $lazyLoad = true)
+    {
+        return $container->services['preload_sidekick'] = new \stdClass();
+    }
+}
+
     [Container%s/getRuntimeErrorService.php] => <?php
 
 namespace Container%s;
@@ -731,6 +754,7 @@ class ProjectServiceContainer extends Container
             'method_call1' => 'getMethodCall1Service',
             'new_factory_service' => 'getNewFactoryServiceService',
             'non_shared_foo' => 'getNonSharedFooService',
+            'preload_sidekick' => 'getPreloadSidekickService',
             'runtime_error' => 'getRuntimeErrorService',
             'service_from_static_method' => 'getServiceFromStaticMethodService',
             'tagged_iterator' => 'getTaggedIteratorService',
@@ -873,6 +897,7 @@ require __DIR__.'/Container%s/getThrowingOneService.php';
 require __DIR__.'/Container%s/getTaggedIteratorService.php';
 require __DIR__.'/Container%s/getServiceFromStaticMethodService.php';
 require __DIR__.'/Container%s/getRuntimeErrorService.php';
+require __DIR__.'/Container%s/getPreloadSidekickService.php';
 require __DIR__.'/Container%s/getNonSharedFooService.php';
 require __DIR__.'/Container%s/getNewFactoryServiceService.php';
 require __DIR__.'/Container%s/getMethodCall1Service.php';
@@ -906,6 +931,8 @@ $classes[] = 'Foo';
 $classes[] = 'LazyContext';
 $classes[] = 'FooBarBaz';
 $classes[] = 'FactoryClass';
+$classes[] = 'Some\Sidekick1';
+$classes[] = 'Some\Sidekick2';
 $classes[] = 'Request';
 $classes[] = 'Symfony\Component\DependencyInjection\ContainerInterface';
 

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php

@@ -45,6 +45,7 @@ class ProjectServiceContainer extends Container
             'lazy_context_ignore_invalid_ref' => 'getLazyContextIgnoreInvalidRefService',
             'method_call1' => 'getMethodCall1Service',
             'new_factory_service' => 'getNewFactoryServiceService',
+            'preload_sidekick' => 'getPreloadSidekickService',
             'runtime_error' => 'getRuntimeErrorService',
             'service_from_static_method' => 'getServiceFromStaticMethodService',
             'tagged_iterator' => 'getTaggedIteratorService',
@@ -359,6 +360,16 @@ class ProjectServiceContainer extends Container
         return $instance;
     }
 
+    /**
+     * Gets the public 'preload_sidekick' shared service.
+     *
+     * @return \stdClass
+     */
+    protected function getPreloadSidekickService()
+    {
+        return $this->services['preload_sidekick'] = new \stdClass();
+    }
+
     /**
      * Gets the public 'runtime_error' shared service.
      *

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories.txt

@@ -75,6 +75,7 @@ class ProjectServiceContainer extends Container
             'method_call1' => 'getMethodCall1Service',
             'new_factory_service' => 'getNewFactoryServiceService',
             'non_shared_foo' => 'getNonSharedFooService',
+            'preload_sidekick' => 'getPreloadSidekickService',
             'runtime_error' => 'getRuntimeErrorService',
             'service_from_static_method' => 'getServiceFromStaticMethodService',
             'tagged_iterator' => 'getTaggedIteratorService',
@@ -400,6 +401,16 @@ class ProjectServiceContainer extends Container
         return new \Bar\FooClass();
     }
 
+    /**
+     * Gets the public 'preload_sidekick' shared service.
+     *
+     * @return \stdClass
+     */
+    protected function getPreloadSidekickService()
+    {
+        return $this->services['preload_sidekick'] = new \stdClass();
+    }
+
     /**
      * Gets the public 'runtime_error' shared service.
      *
@@ -549,6 +560,8 @@ $classes[] = 'Foo';
 $classes[] = 'LazyContext';
 $classes[] = 'FooBarBaz';
 $classes[] = 'FactoryClass';
+$classes[] = 'Some\Sidekick1';
+$classes[] = 'Some\Sidekick2';
 $classes[] = 'Request';
 $classes[] = 'Symfony\Component\DependencyInjection\ContainerInterface';
 

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_errored_definition.php

@@ -45,6 +45,7 @@ class Symfony_DI_PhpDumper_Errored_Definition extends Container
             'lazy_context_ignore_invalid_ref' => 'getLazyContextIgnoreInvalidRefService',
             'method_call1' => 'getMethodCall1Service',
             'new_factory_service' => 'getNewFactoryServiceService',
+            'preload_sidekick' => 'getPreloadSidekickService',
             'runtime_error' => 'getRuntimeErrorService',
             'service_from_static_method' => 'getServiceFromStaticMethodService',
             'tagged_iterator' => 'getTaggedIteratorService',
@@ -359,6 +360,16 @@ class Symfony_DI_PhpDumper_Errored_Definition extends Container
         return $instance;
     }
 
+    /**
+     * Gets the public 'preload_sidekick' shared service.
+     *
+     * @return \stdClass
+     */
+    protected function getPreloadSidekickService()
+    {
+        return $this->services['preload_sidekick'] = new \stdClass();
+    }
+
     /**
      * Gets the public 'runtime_error' shared service.
      *

src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services9.xml

@@ -148,6 +148,10 @@
       <argument type="service" id="errored_definition"/>
     </service>
     <service id="errored_definition" class="stdClass"/>
+    <service id="preload_sidekick" class="stdClass" public="true">
+      <tag name="container.preload" class="Some\Sidekick1"/>
+      <tag name="container.preload" class="Some\Sidekick2"/>
+    </service>
     <service id="Psr\Container\ContainerInterface" alias="service_container" public="false">
       <deprecated package="symfony/dependency-injection" version="5.1">The "%alias_id%" autowiring alias is deprecated. Define it explicitly in your app if you want to keep using it.</deprecated>
     </service>

src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services9.yml

@@ -191,3 +191,9 @@ services:
         public: true
     errored_definition:
         class: stdClass
+    preload_sidekick:
+        class: stdClass
+        tags:
+            - {name: container.preload, class: 'Some\Sidekick1'}
+            - {name: container.preload, class: 'Some\Sidekick2'}
+        public: true

src/Symfony/Component/ExpressionLanguage/ExpressionLanguage.php

@@ -14,6 +14,9 @@ namespace Symfony\Component\ExpressionLanguage;
 use Psr\Cache\CacheItemPoolInterface;
 use Symfony\Component\Cache\Adapter\ArrayAdapter;
 
+// Help opcache.preload discover always-needed symbols
+class_exists(ParsedExpression::class);
+
 /**
  * Allows to compile and evaluate expressions written in your own DSL.
  *

src/Symfony/Component/Translation/Translator.php

@@ -24,6 +24,9 @@ use Symfony\Component\Translation\Loader\LoaderInterface;
 use Symfony\Contracts\Translation\LocaleAwareInterface;
 use Symfony\Contracts\Translation\TranslatorInterface;
 
+// Help opcache.preload discover always-needed symbols
+class_exists(MessageCatalogue::class);
+
 /**
  * @author Fabien Potencier <fabien@symfony.com>
  */