1. Do most of the work in creating meshes in parallel (i.e. everything that can happen on the non-Main mesh object) 2. Faster creation of transform F-Curves using the same machinery as !137004 (mostly speeds up animated characters import) 3. Make ufbx do FBX file parsing itself in parallel Generally makes import 2x-5x faster, more detailed timings in the PR. Pull Request: https://projects.blender.org/blender/blender/pulls/138367