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29 lines
1.1 KiB
Plaintext
29 lines
1.1 KiB
Plaintext
This directory contains the test results in preparation for the removal
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of the PixelTransformer class.
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Tests were performed on Linux with these CPUs:
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- Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
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- ARM i.MX6 DualLite @ 1 GHz
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The tests show that the new bufferFromBuffer() has similar performance
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as PixelTransformer in most cases. It gets beaten in two cases:
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- Input format is 16 BPP and PixelTransformer is in the
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non-economical mode (the default mode).
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- Input format is 8 BPP, mode irrelevant.
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PixelTransformer is about twice as fast in both these cases (more if
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converting between two low colour formats).
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Although this is significant, it is in cases that are already difficult
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to deal with performance wise, and exceedingly rare with modern
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hardware. As such it is difficult to motivate the extra complexity that
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PixelTransformer requires.
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If it turns out that these cases are significant, than we can move
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PixelTransformer's massive lookup tables into a shared cache in
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PixelFormat. Implementation complexity would be similar, but at least
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we would have a friendly API.
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