Comments (3)
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.
from little-cms.
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.
from little-cms.
Historical issue that finally I can close :-)
just use the fast float plug-in, included in lcms2-2.10
from little-cms.
Related Issues (20)
- version mismatch in some files HOT 1
- 2.16: meson falis HOT 6
- Simple Question: How do I get "cmsICCMeasurementConditions" data in IccProfile? HOT 2
- lcms2-2.16 crashes transforming sRGB float to planar uint16 HOT 9
- Eval4Inputs optimisation HOT 5
- CI: use a dependency update tool to keep GitHub Actions updated
- website blog doesn't announce 2.16 release HOT 1
- Backwards incompatible API-change in 2.16 HOT 5
- The fast float plugin doesn't premultiply alpha HOT 1
- Plugins lack soversion when configured with meson
- Possible NPD in cmsCreate_OkLabProfile HOT 2
- FTBFS since commit c429e37 wrt type checking on pointer types HOT 2
- ICC profile with CICP tag HOT 14
- Unable to find program in file system after install HOT 4
- Overflow checks in cmsCreateExtendedTransform HOT 1
- CIE XYZ D65 profile HOT 5
- Non-equidistant planes in DoTransformLineStride HOT 1
- cmsCreateTransform returns nullptr in 2.16, but works in 2.15- HOT 6
- The build system seems to have obsolete zlib support HOT 1
- MD5 computation of Profile ID seems to zero wrong header field HOT 1
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