From fadf6a5e31cc385aa88937ef6611a6ca035be708 Mon Sep 17 00:00:00 2001
From: David Stoline <drupal@davidstoline.com>
Date: Fri, 25 May 2012 09:30:20 -0400
Subject: [PATCH] Optimize element_children()

Applying patch from D.O http://drupal.org/node/1345204
---
 includes/common.inc | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/includes/common.inc b/includes/common.inc
index fbd68270416..7468f817cce 100644
--- a/includes/common.inc
+++ b/includes/common.inc
@@ -3076,10 +3076,18 @@ function element_child($key) {
 }
 
 /**
- * Get keys of a structured array tree element that are not properties (i.e., do not begin with '#').
+ * Get keys of a structured array tree element that are not properties
+ * (i.e., do not begin with '#').
  */
 function element_children($element) {
-  return array_filter(array_keys((array) $element), 'element_child');
+  $results = array();
+  foreach ((array) $element as $key => $value) {
+    // Inlined call to element_child() for performance reasons.
+    if (!isset($key[0]) || $key[0] != '#') {
+      $results[] = $key;
+    }
+  }
+  return $results;
 }
 
 /**