[Fontconfig] commit: drastic fontconfig speedups

Matthias Clasen mclasen at redhat.com
Mon Nov 28 20:17:01 PST 2005

On Sun, 2005-11-27 at 20:48 -0500, Patrick Lam wrote:
> Hi all,
> The folks at SuSE have been profiling and contributing a number of
> performance patches for fontconfig, which I've all reviewed and
> committed.  The most recent one is for FcFontSetMatch, which they report
> gives a 3.5x speedup in fontconfig; that patch rewrote the algorithm by
> inlining FcCompare and swapping the order of the loops, blocking fonts
> that were ineligible for being the best font.  So while both the old
> algorithm and the new algorithm are linear in the number of installed
> fonts, the new algorithm is much faster than the old algorithm by doing
> a lot less value list compares.
> Lots of thanks to Dirk Mueller, Stephen Kulow and Michael Matz!
> pat

Hmm, I might be missing something, but after updating today, my fc-list
does not list any fonts anymore. Maybe the optimization was a bit too


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