9a3ceb79de
The standard `threading::parallel_for` function tries to split the range into uniformly sized subranges. This is great if each element takes approximately the same amount of time to compute. However, there are also situations where the time required to do the work for a single index differs significantly between different indices. In such a case, it's better to split the tasks into segments while taking the size of each task into account. This patch implements `threading::parallel_for_weighted` which allows passing in an additional callback that returns the size of each task. Pull Request: https://projects.blender.org/blender/blender/pulls/118348
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