f4e6ad4d24
Replace Listbase with a VectorList for duplist generation. Performing one heap allocation for each dupli becomes very costly on scenes with many instances. Using a VectorList can make playback up to 15% faster. Most scenes will have lower performance improvements, but none of the ones I tested were slower. VectorLists also have the advantage of being able to query the size of the duplilist. Pull Request: https://projects.blender.org/blender/blender/pulls/138947
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