Saturday, July 11, 2009

More on speed

As promised, I have updated the snapshot. The performance numbers on matrix-shaper to matrix shaper should be close to what lcms2 is going to deliver when released. If you want to run the testbed, you would need to copy those profiles from Photoshop distribution, as I'm not allowed to redistribute that:
  • AdobeRGB1998.icc
  • CoatedFOGRA27.icc
  • UncoatedFOGRA29.icc
  • USWebCoatedSWOP.icc
  • USWebUncoated.icc
Put them on the "testbed" folder. Ok, now just type

./configure; make; make check

Then take a look on the numbers at the end of the testbed execution.

tifficc utility should also work to some extent, but there is a 1-pixel caché that may give bad performance. I have to turn caché off for such profiles as the caché code takes more than the transform itself.

It is funny to note that this is pure "C" code, and in some situations outperforms SSE2 hand-written assembly. That was the case when using the Intel compiler.

64-bits hardware is pretty untested, so if you manage to make it work on such architectures, please drop me a note, thanks!

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