https://bugzilla.wikimedia.org/show_bug.cgi?id=70177

--- Comment #3 from Ori Livneh <o...@wikimedia.org> ---
(In reply to Jackmcbarn from comment #2)
> I notice that it's not just Lua time usage that's bad; core's "CPU time
> usage" is also really high. Is that problem related to this one?

Yes. The fact that concurrent threads reinstall each other's signal handlers
means that requests can make each other linger, increasing the backend response
time.

Your question prompted me to take a look at ParserOutput::getTimes. I found
that it also has a separate bug which, like this one, stems from the
assumptions it makes about the underlying runtime's threading model. Filed as
bug 70227.

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