From a1244706bed33b37372b3bc2bde963ed379edc79 Mon Sep 17 00:00:00 2001
From: martinlanghoff <martinlanghoff>
Date: Wed, 19 Sep 2007 07:01:41 +0000
Subject: [PATCH] user_set_preference(): minor optimisation

Don't update if the values already match...
---
 lib/moodlelib.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index af94426421..3d63fd57e8 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -786,6 +786,9 @@ function set_user_preference($name, $value, $otheruserid=NULL) {
         // no pernament storage for not-logged-in user and guest
 
     } else if ($preference = get_record('user_preferences', 'userid', $userid, 'name', addslashes($name))) {
+        if ($preference->value === $value) {
+            return true;
+        }
         if (!set_field('user_preferences', 'value', addslashes((string)$value), 'id', $preference->id)) {
             $return = false;
         }
-- 
2.39.5