[Fontconfig] no `stable' cache file in `~/.fonts'

[Khaled Hosny]

On Mon, Aug 29, 2016 at 11:46:57AM -0700, Behdad Esfahbod wrote:
> On Sun, Aug 28, 2016 at 9:07 PM, Werner LEMBERG <wl at gnu.org> wrote:
> >
> >> In that version, we've tried to prevent the race on updating caches
> >> by re-scanning a directory after updating a cache once. which isn't
> >> being done on the latest anymore.
> >
> > OK, thanks.  Will update.
> >
> > [I noticed the issue mainly because I have `NotoCJKSans.ttc' (file
> >  size 112MByte) in the `~/.fonts' directory, and it takes a loong time
> >  until the many different faces in the TTC are scanned.]
> 
> Speaking of which, it was 5x faster with non-Adobe CFF code in
> FreeType.  Maybe we should use FT_Property_Set to enable faster one if
> it's available.

Or may be it is time to stop FontConfig from rasterising glyphs just to
second guess fonts. I have been adding dummy glyphs to my fonts for
years to prevent FontConfig from rejecting perfectly valid fonts,
needlessly increasing file size and production complexity.

Regards,
Khaled