Wikimedia Bugzilla is closed!

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.