darktable-org/darktable — pull request #495 by LebedevRI (2014-03-16 14:35:51+00:00)
Title: Colorout (xform codepath): speedup

Use TYPE_LabA_FLT and TYPE_RGBA_FLT, thus removing need for intermediate buffer, and adding support for usage of SSE2 intrinsics

Speed gain (on export, not 100% correct):
186 "timer ticks" (no gamutcheck) -> 56 (or 6? (with gamutcheck)), 6 (or 0??? (no gamutcheck))