[Fontconfig-bugs] [Bug 64766] Make fontconfig scanning faster

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=64766

Akira TAGOH <akira at tagoh.org> changed:

           What    |Removed                     |Added
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                 CC|                            |akira at tagoh.org

--- Comment #1 from Akira TAGOH <akira at tagoh.org> ---
(In reply to comment #0)
> Looking at profiler output, most time when scanning a font is spent inside
> of freetype below FT_Load_Glyph. (Something about running the truetype
> bytecode interpreter...) Is that really needed for basic fontconfig
> functionality?

That is required to let fontconfig know what the glyph coverage a font has.

> The 2nd case is worse: changing a single file in a directory containing
> fonts forces the whole directory to be scanned. Can't caching be done on a
> per-file basis?

I don't see what you really mean. in fact fontconfig do cache a font per file.

> For some users this is a deal breaker, and they're asking for hacks to
> remove fontconfig usage etc. It would be nice if fontconfig could solve this
> issue by optimizing the scan process and making the caching more clever.

I don't know how often it happens though, they may see something like annoyance
in fontconfig without creating a cache before doing something on their
fontconfig-based applications. this is why fontconfig is going to create a
cache though.

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