[Fontconfig] Fontconfig performance question.

[Krzysztof Dabrowski]

> And since font configuration rarely changes, then it could be loaded only
> one, then saved to disk for other applications to use and have a reasonable
> TTL (a day/week/whatever).

Or the whole configuration could be put into shared memory and then used 
directly by other instances of the library. Correct me, but this seems to be 
the fastest option...

Kris