https://bugzilla.wikimedia.org/show_bug.cgi?id=51561
Web browser: ---
Bug ID: 51561
Summary: Severe performance issue on history pages
Product: MediaWiki
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: major
Priority: Unprioritized
Component: History/Diffs
Assignee: [email protected]
Reporter: [email protected]
Classification: Unclassified
Mobile Platform: ---
Created attachment 12873
--> https://bugzilla.wikimedia.org/attachment.cgi?id=12873&action=edit
Runtime profile created with Firefox 22's internal profiler, "debug=true", soft
reload (e.g. caches should be available)
I'm facing a severe performance issue on history pages in Firefox 22 on Windows
7 x64. Page load is very slow (with bits.wikimedia.org being acesses multiple
times in the beginning), later on there seems to be executed some heavy
JavaScript which makes the browser unresponsive over large amounts of time.
I'll attach an image which shows Firefox's native profiler window. It seems
there are mainly three functions taking up most of the CPU time:
1) "curCSS()" which is called from an anonymous function in
"mediawiki.searchSuggest.js"
2) "updateDiffRadios()" which gets called from "jQuery.prototype.ready()" in
"load.php"
3) "DocumentUtils_getFormData() which gets called from "ssi_onTimerCallback()"
in "SessionStore.jsm"
While 2) looks to be clearly related to history pages, 1) puzzles me. I have no
idea about 3).
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