xput comparative 1.19 vs. 2.0

Here is the comparative for the code in git. I will publish beta2 in a couple of days. As you can see the xput improvements are considerable.

1.19
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16 bits on CLUT profiles                     : 10.6667 MPixel/sec.
8 bits on CLUT profiles                      : 9.75015 MPixel/sec.
8 bits on Matrix-Shaper profiles             : 3.8638 MPixel/sec.
8 bits on SAME Matrix-Shaper profiles        : 4.28495 MPixel/sec.
8 bits on Matrix-Shaper profiles (AbsCol)    : 10.4507 MPixel/sec.
16 bits on Matrix-Shaper profiles            : 3.92349 MPixel/sec.
16 bits on SAME Matrix-Shaper profiles       : 3.96924 MPixel/sec.
16 bits on Matrix-Shaper profiles (AbsCol)   : 10.6667 MPixel/sec.
8 bits on curves                             : 4.33839 MPixel/sec.
16 bits on curves                            : 4.3944 MPixel/sec.
8 bits on CMYK profiles                      : 4.09626 MPixel/sec.
16 bits on CMYK profiles                     : 3.96924 MPixel/sec.
8 bits on gray-to-gray                       : 24.3902 MPixel/sec.
8 bits on SAME gray-to-gray                  : 24.3902 MPixel/sec.


2.0
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16 bits on CLUT profiles                     : 10.1394 MPixel/sec.
8 bits on CLUT profiles                      : 10.6667 MPixel/sec.
8 bits on Matrix-Shaper profiles             : 26.2726 MPixel/sec.
8 bits on SAME Matrix-Shaper profiles        : 30.1318 MPixel/sec.
8 bits on Matrix-Shaper profiles (AbsCol)    : 10.5541 MPixel/sec.
16 bits on Matrix-Shaper profiles            : 10.2433 MPixel/sec.
16 bits on SAME Matrix-Shaper profiles       : 9.84615 MPixel/sec.
16 bits on Matrix-Shaper profiles (AbsCol)   : 10.6667 MPixel/sec.
8 bits on curves                             : 30.0752 MPixel/sec.
16 bits on curves                            : 35.3201 MPixel/sec.
8 bits on CMYK profiles                      : 4.19727 MPixel/sec.
16 bits on CMYK profiles                     : 4.26667 MPixel/sec.
8 bits on gray-to-gray                       : 40.9207 MPixel/sec.
8 bits on SAME gray-to-gray                  : 40.9207 MPixel/sec.
8 bits on CMYK profiles                      : 4.3573 MPixel/sec.
16 bits on CMYK profiles                     : 4.55192 MPixel/sec.
8 bits on gray-to-gray                       : 39.312 MPixel/sec.
8 bits on SAME gray-to-gray                  : 40.9207 MPixel/sec.