Re: font-backend

[Jason Rumney]

YAMAMOTO Mitsuharu wrote:
> I'm developing a font backend driver using Core Text, which is a new
> framework available from Mac OS X 10.5.  It was slower than Emacs 22
> first, but now it shows good performance with caching the results of
> metrics calculations.
>   
Yes, it is definitely the metrics calculations that are slowing things 
down on Windows too. I added some code to cache the metrics for ASCII 
characters some time ago, but the problem remains for buffers containing 
many non-ASCII characters.