FIX Less cache fragmentation in ClassManifest (#11533)

src/Core/Manifest/ClassManifest.php

@@ -53,6 +53,16 @@ class ClassManifest
      */
     protected $cacheKey;
 
+    /**
+     * In memory cache array for individually parsed files
+     */
+    protected ?array $filesCache = null;
+
+    /**
+     * Key to use for files cache
+     */
+    protected string $filesCacheKey;
+
     /**
      * Array of properties to cache
      *
@@ -203,6 +213,7 @@ public function __construct($base, CacheFactory $cacheFactory = null)
         $this->base = $base;
         $this->cacheFactory = $cacheFactory;
         $this->cacheKey = 'manifest';
+        $this->filesCacheKey = 'manifestFiles';
     }
 
     private function buildCache($includeTests = false)
@@ -563,6 +574,7 @@ public function regenerate($includeTests)
 
         if ($this->cache) {
             $data = $this->getState();
+            $this->cache->set($this->filesCacheKey, $this->filesCache);
             $this->cache->set($this->cacheKey, $data);
             $this->cache->set('generated_at', time());
             $this->cache->delete('regenerate');
@@ -587,11 +599,15 @@ public function handleFile($basename, $pathname, $includeTests)
         // since just using the datetime lead to problems with upgrading.
         $key = preg_replace('/[^a-zA-Z0-9_]/', '_', $basename ?? '') . '_' . md5_file($pathname ?? '');
 
+        if ($this->cache && $this->filesCache === null) {
+            $this->filesCache = $this->cache->get($this->filesCacheKey);
+        }
+
         // Attempt to load from cache
         // Note: $classes, $interfaces and $traits arrays have correct-case keys, not lowercase
         $changed = false;
         if ($this->cache
-            && ($data = $this->cache->get($key))
+            && ($data = ($this->filesCache[$key] ?? null))
             && $this->validateItemCache($data)
         ) {
             $classes = $data['classes'];
@@ -698,7 +714,8 @@ public function handleFile($basename, $pathname, $includeTests)
                 'traits' => $traits,
                 'enums' => $enums,
             ];
-            $this->cache->set($key, $cache);
+
+            $this->filesCache[$key] = $cache;
         }
     }