https://bugzilla.wikimedia.org/show_bug.cgi?id=73181

--- Comment #2 from Ori Livneh <o...@wikimedia.org> ---
(In reply to MZMcBride from comment #1)
> I guess I'm being opted in at a higher level.

Not exactly. testwiki is a special case: it is served by a single host on the
cluster, mw1017. So unlike other wikis, it cannot be served using either HHVM
or Zend: it's one or the other. We converted testwiki to HHVM early on (for
obvious reasons), so all edits are tagged.

(In reply to MZMcBride from comment #0)
> My edits are being marked with HHVM revision tags. This is gross. It's a
> very internal implementation detail that's being permanently attached to my
> edits and I'm pretty sure I never even opted in.

Not permanently: I've indicated elsewhere that the tag will be expunged once
the migration is complete. We can keep this bug open as a way of tracking that
commitment.

I agree that it is ugly and bothersome. The tag was initially added at Mark
Bergsma's request as a precaution, to help us clean up if we discover that HHVM
is mangling edits somehow. We're also using it to investigate whether the
improved response times correlate with increased productivity for new users, as
documented
<https://meta.wikimedia.org/wiki/Research:HHVM_newcomer_engagement_experiment>.

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