https://bugzilla.wikimedia.org/show_bug.cgi?id=63928
Bug ID: 63928
Summary: PHP shims for JSON i18n files can register
LocalisationCacheRecache handlers multiple times
Product: MediaWiki
Version: 1.23-git
Hardware: All
OS: All
Status: NEW
Keywords: performance
Severity: normal
Priority: Unprioritized
Component: Internationalization
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected]
Web browser: ---
Mobile Platform: ---
From Adrian Lang's email to wikitech-l
<http://www.gossamer-threads.com/lists/wiki/wikitech/452196>:
> I recently investigated a performance issue with one of Wikibase's
> test cases. The test in question performed a formatting task for all
> known languages. While the first assertions ran as fast as expected,
> they rapidly got slower until finally taking seconds per assertion. I
> figured this was an actual performance bug (although hardly triggered
> in production) and started profiling.
>
> My findings, in short:
>
> * The shims for $wgExtensionMessagesFiles as generated by
> maintenance/generateJsonI18n.php register a handler for the hook
> LocalisationCacheRecache when included
> * For every new language loaded, all $wgExtensionMessagesFiles are
> included by LocalisationCache::recache
> * Afterwards, LocalisationCache::recache runs the hook
> LocalisationCacheRecache
>
> This leads to the obvious issue that there is a growing number of
> registered handlers, which slows down the hook, which slows down the
> test.
The shims should be fixed to avoid this.
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