ca484461_Tags___Wikimedia_Foundation__Full_description_of_meaning
[Tag name] HHVM [Appearance on change lists] HHVM [Source] Defined by an extension [Active?] No [Tagged changes] 136 changes [Full description of meaning] 
Revisions made with the HipHop Virtual Machine enabled instead of the Zend PHP interpreter (expected to improve performance, tagged for debugging/analysis)
Tags - Wikimedia Foundation
Full description of meaning