Sascha Grossenbacher
--- a/src/PluginType/PluginTypeManager.php
+++ b/src/PluginType/PluginTypeManager.php
      return $this->pluginTypes;
    }

+    $plugin_types = $this->cache->get('plugin:plugin_type');
+
+    // Return immediately if all data is available in the cache.
+    if (is_array($plugin_types)) {
--- a/src/PluginType/PluginTypeManager.php
+++ b/src/PluginType/PluginTypeManager.php

      // Store the plugin types in the static and file caches.
      $this->pluginTypes += $file_plugin_types;
-      $file_cache->set($file, $file_plugin_types);
    }
+    $this->cache->set('plugin:plugin_type', $this->pluginTypes);

    return $this->pluginTypes;
  }

+  protected function readFiles(array $files): array {