A partial answer: I wrote a script under Pywikipedia framework to search templates with many parser functions that are worth to convert to Lua now: [[mw:Special:Code/pywikipedia/11099]]. I hope that it helps you to find good targets.
The result looks like http://hu.wikipedia.org/wiki/Wikip%C3%A9dia:Sablonm%C5%B1hely/Lua_k%C3%ADv%C... .
2013/3/7 Robert Rohde rarohde@gmail.com
Is there some list or tool that identifies Wikipedia pages that are slow to parse?
My interest is mainly in the context of Lua deployment. I would like to identify non-obvious templates that may be having an appreciable impact on performance. (As opposed to things like {{cite}}, where the performance problems are already well-known.)
I don't suppose the database stores a "time for last parse" somewhere?
On enwiki we've already made Lua conversions with most of the string templates, several formatting templates (e.g. {{rnd}}, {{precision}}), {{coord}}, and a number of others. And there is work underway on a number of the more complex overhauls (e.g. {{cite}}, {{convert}}). However, it would be nice to identify problematic templates that may be less obvious.
-Robert Rohde aka Dragons_flight
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