[cairo] text measurement in perf?

[JustFillBug]

On 2007-05-29, Behdad Esfahbod <behdad at behdad.org> wrote:
>
> Seems like for both Chinese and Japanese a cache of around 2000
> character is more than enough (same way that 256 is more than enough for
> Western scripts).  Not sure how to fix this without regressing.  Xft has
> a global cache size limit and a per-font one, and uses a global glyph
> cache.  Cairo used to be similar but Keith rewrote it to use per-font
> glyph cache.  We probably should make it adaptive.  I need to do similar
> things in Pango too, so I'll give it some thought and come back.
>

2 stage cache. 1st 256, 2nd 2048.