From e68789c559f9a7633789d39bf3e23ae543b40923 Mon Sep 17 00:00:00 2001
From: Petr Skoda <commits@skodak.org>
Date: Sat, 12 Feb 2011 16:48:32 +0100
Subject: [PATCH] MDL-26380 improve perf of mediaplugin filter if no links
 found in text

---
 filter/mediaplugin/filter.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/filter/mediaplugin/filter.php b/filter/mediaplugin/filter.php
index 6a9ec854a82..d7b21297fcf 100644
--- a/filter/mediaplugin/filter.php
+++ b/filter/mediaplugin/filter.php
@@ -46,6 +46,11 @@ class filter_mediaplugin extends moodle_text_filter {
             // non string data can not be filtered anyway
             return $text;
         }
+        if (stripos($text, '</a>') === false) {
+            // performance shortcut - all regexes bellow end with the </a> tag,
+            // if not present nothing can match
+            return $text;
+        }
         $newtext = $text; // fullclone is slow and not needed here
 
         if (!empty($CFG->filter_mediaplugin_enable_mp3)) {