From: Ori Livneh <ori@wikimedia.org>
Date: Fri, 17 Jul 2015 21:46:03 +0000 (-0500)
Subject: Make the User Timing API safe to use in MediaWiki
X-Git-Tag: 1.31.0-rc.0~10697^2
X-Git-Url: http://git.cyclocoop.org/%28?a=commitdiff_plain;h=7076ee791fe3e991e2a0f8ab17f6bf3fab92df57;p=lhc%2Fweb%2Fwiklou.git

Make the User Timing API safe to use in MediaWiki

Allow JavaScript code to be annotated via the User Timing API without having to
repeatedly ensure that the API exists by declaring a no-op stub for browsers
that don't implement it. Do it in the startup module so we can use
performance.mark() early. Add an initial performance.mark() call as a use-case.

Task: T105389
Change-Id: Id686073da5baf3fcae36f296e6e50d648a543249
---

diff --git a/.jshintrc b/.jshintrc
index d72c31d66f..b84d276621 100644
--- a/.jshintrc
+++ b/.jshintrc
@@ -22,6 +22,7 @@
 		"mediaWiki": true,
 		"JSON": true,
 		"OO": true,
+		"performance": true,
 		"jQuery": false,
 		"QUnit": false,
 		"sinon": false
diff --git a/resources/src/startup.js b/resources/src/startup.js
index 80cc7d935a..5ee295bd91 100644
--- a/resources/src/startup.js
+++ b/resources/src/startup.js
@@ -6,6 +6,14 @@
 
 var mediaWikiLoadStart = ( new Date() ).getTime();
 
+if ( !window.performance ) {
+	window.performance = {};
+}
+if ( !performance.mark ) {
+	performance.mark = function () {};
+}
+performance.mark( 'mediaWikiStartUp' );
+
 /**
  * Returns false for Grade C supported browsers.
  *