forked from blender/blender-addons
zlib.compress() releases the GIL so can be multithreaded. This patch adds a context manager to FBXElem that temporarily enables multithreading of the compression of added arrays, by using the recently added utility to schedule CPU-bound tasks to run on separate threads. On my Ryzen 7 3800x, exporting non-animated rigged humanoid models typically results in about a 1.2 to 1.4 times faster export. Exporting only simple geometry, such as many subdivided default cubes, can be about 2 to 3 times faster. The multithreading is also enabled for the `json2fbx.py` script. No changes are expected to the contents of exported files. Pull Request: blender/blender-addons#105018