Comments (3)
mstimberg
commented on May 15, 2024
I ran pdftops altona_technical_1v2_x3.pdf through valgrind. The problem seems to be that cmsStageSampleCLut16 in cmslut.c ends up calling XFormSampler16 (cmsopt.c) 10 million times which eventually leads to 30 million calls of DefaultEvalParametricFunction (cmsgamma.c). The calculations call the math library's pow function 60 million times in total which seems to be where most of the time is spent.
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thomas-weber
commented on May 15, 2024
Is this issue still relevant? I tried to reproduce the number of calls in mstimberg's comment, but I'm unable to do so with lcms2 2.8. There, DefaultEvalParametricFunction is called 29053 times.
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mm2
commented on May 15, 2024
Historical issue that finally I can close :-)
just use the fast float plug-in, included in lcms2-2.10
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