ijl15 vs ijl20 vs IPP jpeg decode performance

trebo
January 25, 2008 5:42 AM PST
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#5 Reply to #4

I have tried with different values for m_param_jpeg. now. However, the only parameter improving the speed is m_param_jpeg.dct_scale.

When I increase this from JD_1_1 it gets faster:
JD_1_1 - 1750 ms
JD_1_2 - 1620 ms
JD_1_4 - 1320 ms
JD_1_8 - 1030 ms

With ijl15 it takes about 12 ms to decode one image, but then this is still full size and not scaled down as the case is when JD differs from 1_1.

And I am using DLLs, so this shouldn't be the matter either...

Any other suggestions?

Br,
Robert

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