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authorDavid Faure <>2016-08-04 10:01:21 +0200
committerDavid Faure <>2016-08-05 09:56:12 +0000
commit434c52269564c84e3ea57242b7aaa2fd7cad3f54 (patch)
treefa3818b5b59278d6f37e7bca834b6f908f15b885 /doc
parenteb4bcdd8cec77c558cc75d31730cff89852dd684 (diff)
Improve performance of QColor::name, now more than 4 times faster
Before: HexRgb: 0.00230 ms per iteration, HexArgb: 0.00290 ms per iteration After: HexRgb: 0.00051 ms per iteration, HexArgb: 0.00061 ms per iteration This showed up as a relevant optimization when profiling KIconLoader which uses QColor::name() as part of the key -- thanks to Mark Gaiser for the investigation and first suggestion of a solution. I have also seen customer code writing a replacement for QColor::name() because it was too slow to be used as a hash key. Change-Id: I009ccdd712ea0d869d466e2c9894e0cea58f0e68 Reviewed-by: Marc Mutz <>
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