Use the optimized FilesystemTagAwareAdapter by default if available

Author: Toflar

src/Psr6Store.php

@@ -14,6 +14,7 @@
 use Psr\Cache\InvalidArgumentException;
 use Symfony\Component\Cache\Adapter\AdapterInterface;
 use Symfony\Component\Cache\Adapter\FilesystemAdapter;
+use Symfony\Component\Cache\Adapter\FilesystemTagAwareAdapter;
 use Symfony\Component\Cache\Adapter\TagAwareAdapter;
 use Symfony\Component\Cache\Adapter\TagAwareAdapterInterface;
 use Symfony\Component\Cache\PruneableInterface;
@@ -122,6 +123,11 @@ public function __construct(array $options = [])
                 throw new MissingOptionsException('The cache_directory option is required unless you set the cache explicitly');
             }
 
+            // As of Symfony 4.3+ we can use the optimized FilesystemTagAwareAdapter
+            if (class_exists(FilesystemTagAwareAdapter::class)) {
+                return new FilesystemTagAwareAdapter('', 0, $options['cache_directory']);
+            }
+
             return new TagAwareAdapter(
                 new FilesystemAdapter('', 0, $options['cache_directory'])
             );