HHVM/About

hhvm>Special:MyLanguage/HHVM|HHVM (also known as the HipHop Virtual Machine) is a virtual machine for php>Special:MyLanguage/PHP|PHP, with an associated just-in-time (JIT) compiler. Deploying HHVM on a MediaWiki wiki should lead to performance improvements across the board for most users.

Currently, on Wikimedia wikis, you can opt-in as an editor to using HHVM through the bf>Special:BetaFeatures|Beta Features tab in your preferences. You can verify that it is enabled for you by visiting sv>Special:Version|Special:Version on your wiki, and checking that it says "HHVM" instead of "PHP" in the "Installed software" table. Once the developers and sysadmins are satisfied that it is stable enough, it will become the default for all users.

Our preliminary benchmarks[//www.mediawiki.org/w/index.php?namespace=&tagfilter=HHVM&translations=filter&title=Special%3ARecentChanges filtered] on rc>Special:RecentChanges|Special:RecentChanges. This is to enable faster discovery of any potential bugs. Why are edits made using gadgets not using HHVM? Most gadgets use the api>Special:MyLanguage/API|API to edit, which currently does not support this beta feature. What are the known issues with HHVM? All bugs related to HHVM are tagged with the keyword "hhvm" on , so you can use a [//bugzilla.wikimedia.org/buglist.cgi?keywords=hhvm&keywords_type=allwords&list_id=345439&query_format=advanced&resolution=--- saved search] to see all open bugs. Where should I report issues that I think are related to HHVM? If you're familiar with bugzilla, feel free to file a bug there and tag it with the "hhvm" keyword. If you're familiar with irc>Special:MyLanguage/IRC|IRC, join #wikimedia-tech and report it there. Or just leave a report on the talk page.
 * What does HHVM do?
 * HHVM should decrease the loading time for:
 * Any page you view while logged in.
 * Saving pages that you've edited, whether you are logged in or not.
 * When will the tags be removed?
 * In approximately 3 months, mid-January, if everything goes smoothly.