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2013 Mac Pro: Sigma Photo Pro X3F Raw-to-TIF
Sigma Photo Pro is the Sigma software for processing X3F files from the Sigma DP Merrill cameras. SPP version 5.5.3 is still a 32-bit program.
See the test machine configurations.
Convert thirty DP Merrill X3F files to 16-bit TIF with Sigma Photo Pro 5.5.3.
Version 5.5.3 of Sigma Photo Pro is a 32-bit program, and runs like molasses on all machines, taking 7.9 seconds per file on the fastest Mac Pro.
The 2013 Mac Pros help only a little, and the 12-core model fares particularly poorly, showing that the CPU efficiency of the Sigma Photo Pro software is not good. The SPP software apparently cannot use more than 4 CPU cores without a lot of threading overhead, because the 4-core laptop beats both 12 core systems.
The 8-core 3.3 GHz 2013 Mac Pro fares scarcely better than the 6-core 3.5 GHz, offering a barely noticeable 4.4% reduction in runtime.