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| author | Andreas Hartmetz <andreas@ixgreen.de> | 2019-06-10 14:39:04 +0200 |
|---|---|---|
| committer | Andreas Hartmetz <andreas@ixgreen.de> | 2019-07-06 19:55:02 +0200 |
| commit | eea99e1e8f3eb67fda35dd3a656fe9b5a9be84f2 (patch) | |
| tree | bd94743a619725bc00c1b76add389baa3005ff30 /tests/auto/corelib | |
| parent | 619b92385ead871d1a220bf4bed5a6d2dd09a4fc (diff) | |
Fontconfig font database: Short-circuit matching by filename
If the filename matches, no other matching is necessary. Fontconfig
doesn't have a fast path for that, so implement one here.
Fontconfig is unlikely to add that fast path, see here:
https://gitlab.freedesktop.org/fontconfig/fontconfig/issues/103
With -O1 builds of Qt and KDE stack, 358 fonts installed according
to KDE systemsetting, on a Ryzen 1800X, startup time of kwrite
decreases as following according to perf stat:
msec task-clock: ~480 ms to ~455 ms
cycles: ~1.73e9 to ~1.65e9
Change-Id: I630a80e4bed2647d5bbd95247005aab7d0cb0363
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
Diffstat (limited to 'tests/auto/corelib')
0 files changed, 0 insertions, 0 deletions