From 43a48221753564429c35809fa8b9ac6854e46629 Mon Sep 17 00:00:00 2001
From: Andrew Garrett <werdna@users.mediawiki.org>
Date: Thu, 12 Feb 2009 18:02:27 +0000
Subject: [PATCH] Improve Cite references caching by making it dependent on a
 config setting, which defaults to off. This way, we can still use it as
 emergency optimisation if the need arises.

---
 Cite.php      |  5 +++++
 Cite_body.php | 20 +++++++++++++-------
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/Cite.php b/Cite.php
index c4c79fcd..158bb99f 100644
--- a/Cite.php
+++ b/Cite.php
@@ -45,6 +45,11 @@ define( 'CITE_DEFAULT_GROUP', '');
  */
 $wgAllowCiteGroups = true; 
 
+/**
+ * An emergency optimisation measure for caching cite <references /> output.
+ */
+$wgCiteCacheReferences = false;
+
 function wfCite() {
 	new Cite;
 	return true;
diff --git a/Cite_body.php b/Cite_body.php
index 5b64a63c..b958b4dc 100644
--- a/Cite_body.php
+++ b/Cite_body.php
@@ -367,18 +367,24 @@ class Cite {
 		$cacheKey = wfMemcKey( 'citeref', md5($parserInput), $this->mParser->Title()->getArticleID() );
 
 		wfProfileOut( __METHOD__ .'-entries' );
-
-		wfProfileIn( __METHOD__.'-cache-get' );
-		$data = $wgMemc->get( $cacheKey );
-		wfProfileOut( __METHOD__.'-cache-get' );
 		
-		if ( !$data ) {
+		global $wgCiteCacheReferences;
+		if ( $wgCiteCacheReferences ) {
+			wfProfileIn( __METHOD__.'-cache-get' );
+			$data = $wgMemc->get( $cacheKey );
+			wfProfileOut( __METHOD__.'-cache-get' );
+		}
+		
+		if ( empty($data) ) {
 			wfProfileIn( __METHOD__ .'-parse' );
 			
 			// Live hack: parse() adds two newlines on WM, can't reproduce it locally -ævar
 			$ret = rtrim( $this->parse( $parserInput ), "\n" );
-			$serData = $this->mParser->serialiseHalfParsedText( $ret );
-			$wgMemc->set( $cacheKey, $serData, 86400 );
+			
+			if ( $wgCiteCacheReferences ) {
+				$serData = $this->mParser->serialiseHalfParsedText( $ret );
+				$wgMemc->set( $cacheKey, $serData, 86400 );
+			}
 			
 			wfProfileOut( __METHOD__ .'-parse' );
 		} else {