MDL-39472 MUC: Optimise cache::get_from_persist_cache

2013-06-12 14:29:48 +08:00
parent 6117c578e4
commit 3a2e904098
2 changed files with 16 additions and 4 deletions
@@ -350,6 +350,11 @@ class cache_helper {
     * @param string $definition
     */
    protected static function ensure_ready_for_stats($store, $definition) {
+        // This function is performance-sensitive, so exit as quickly as possible
+        // if we do not need to do anything.
+        if (isset(self::$stats[$definition][$store])) {
+            return;
+        }
        if (!array_key_exists($definition, self::$stats)) {
            self::$stats[$definition] = array(
                $store => array(