bc480f05d5
When using a lot of instances the requested and needed attributes are merged. This process uses a lock even when no work needs to be done. By early exiting the merging process when no work needs to be done the performance of navigating 60k cubes went from 17.5 fps to 18.3 fps. Detected when researching #126391. Pull Request: https://projects.blender.org/blender/blender/pulls/129791