44b7d7592d
Both were largely or completely single threaded. They are used in various places, but testing their usage in VSE compositor modifier branch (!139634), applying a default "do nothing" compositor modifier on a 1080p image (on Ryzen 5950X): 51.4ms -> 12.2ms Details about IMB_byte_from_float: - No longer allocate a full new float buffer, instead do all work in a local small (32KB size, half of typical L1 cache) job-local buffer. - Previous code was doing un-premultiply + OCIO + premultiply + un-premultiply again. That is pointless; just do un-premultiply once. Details about IMB_float_from_byte / IMB_float_from_byte_ex: - Remove incorrect code around"allocate float buffer outside of image buffer" since it was not actually true to begin with. - Inside threaded part, do color space conversion and premultiply at once per-scanline, so that data stays in CPU caches more. Pull Request: https://projects.blender.org/blender/blender/pulls/145716
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