[perf-OpenMage#918] Add runtime cache to Zend_Locale_Data

refs: OpenMage#917, OpenMage#979, OpenMage#1018

Author: tmotyl

lib/Zend/Locale/Data.php

@@ -74,6 +74,13 @@ class Zend_Locale_Data
      */
     private static $_cacheDisabled = false;
 
+    /**
+     * Internal cache, prevent repeated cache requests
+     *
+     * @var array
+     */
+    private static $_localCache = array();
+
     /**
      * Read the content from locale
      *
@@ -335,8 +342,15 @@ public static function getList($locale, $path, $value = false)
 
         $val = urlencode($val);
         $id  = self::_filterCacheId('Zend_LocaleL_' . $locale . '_' . $path . '_' . $val);
+
+        // add runtime cache to avoid calling cache backend multiple times during one request
+        if (isset(self::$_localCache[$id])) {
+            return self::$_localCache[$id];
+        }
         if (!self::$_cacheDisabled && ($result = self::$_cache->load($id))) {
-            return unserialize($result);
+            $result = unserialize($result);
+            self::$_localCache[$id] = $result;
+            return $result;
         }
 
         $temp = array();
@@ -946,11 +960,13 @@ public static function getList($locale, $path, $value = false)
         }
 
         if (isset(self::$_cache)) {
+            $data = serialize($temp);
             if (self::$_cacheTags) {
-                self::$_cache->save( serialize($temp), $id, array('Zend_Locale'));
+                self::$_cache->save( $data, $id, array('Zend_Locale'));
             } else {
-                self::$_cache->save( serialize($temp), $id);
+                self::$_cache->save( $data, $id);
             }
+            static::$_localCache[$id] = $temp;
         }
 
         return $temp;
@@ -984,8 +1000,15 @@ public static function getContent($locale, $path, $value = false)
         }
         $val = urlencode($val);
         $id  = self::_filterCacheId('Zend_LocaleC_' . $locale . '_' . $path . '_' . $val);
+
+        // add runtime cache to avoid calling cache backend multiple times during one request
+        if (isset(self::$_localCache[$id])) {
+            return self::$_localCache[$id];
+        }
         if (!self::$_cacheDisabled && ($result = self::$_cache->load($id))) {
-            return unserialize($result);
+            $result = unserialize($result);
+            self::$_localCache[$id] = $result;
+            return $result;
         }
 
         switch(strtolower($path)) {
@@ -1499,11 +1522,13 @@ public static function getContent($locale, $path, $value = false)
             $temp = current($temp);
         }
         if (isset(self::$_cache)) {
+            $data = serialize($temp);
             if (self::$_cacheTags) {
-                self::$_cache->save( serialize($temp), $id, array('Zend_Locale'));
+                self::$_cache->save( $data, $id, array('Zend_Locale'));
             } else {
-                self::$_cache->save( serialize($temp), $id);
+                self::$_cache->save( $data, $id);
             }
+            static::$_localCache[$id] = $temp;
         }
 
         return $temp;