https://bugzilla.wikimedia.org/show_bug.cgi?id=71868
Bug ID: 71868
Summary: bfcache is disabled
Product: MediaWiki extensions
Version: master
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: MultimediaViewer
Assignee: wikibugs-l@lists.wikimedia.org
Reporter: gti...@wikimedia.org
CC: aarcos.w...@gmail.com, fflo...@wikimedia.org,
gti...@wikimedia.org, mtrac...@member.fsf.org
Web browser: ---
Mobile Platform: ---
Most modern browsers (with the exception of IE and Chrome) include a
back/forward cache, meaning they "freeze" the current state of the page (DOM,
JS variables and all) into memory when navigating away, and pull it out from
there when using back-button navigation, to speed up navigation by skipping
page setup. This functionality can be disabled by various heuristics, if the
browser guesses that the page is doing something that would be broken by the
caching. Sometimes this disabling can be avoided with some care (e.g. using a
pagehide handler instead of an unload handler).
bfcache seems to be disabled on MediaViewer pages (possibly on all MediaWiki
pages, I haven't checked). This results in a significant slowdown; we should
look into ways of avoiding it if possible.
See this StackOverflow post for various bfcache docs:
http://stackoverflow.com/questions/1195440/ajax-back-button-and-dom-updates/1195934#1195934
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