2010/5/25 Aryeh Gregor <Simetrical+wikilist(a)gmail.com>om>:
Templates will often miss the parser cache, because
invocations will use different parameters. Even *with* the parser
cache, parsing is *still* one of the most expensive operations
Wikimedia does, so I'm not so sanguine.
I wasn't talking about the templates themselves hitting the parser
cache, but about the pages that use them. Of course the number of
pages using interwiki transclusion over time plus the edit rate of
those pages could grow to become a problem.
Also note that you wouldn't technically be parsing, just preprocessing
on the home wiki, which is certain to be less expensive (how much less
I don't know), and that you'd be doing this on some wiki anyway, so
only the overhead involved in HTTP, the API and initializing the
parser is relevant; the actual cost of the operation is not, because
you're doing it someplace either way (of course this only applies
intra-WMF, not to external clients).
Roan Kattouw (Catrope)