eb6fe4f6d7
Currently the depsgraph is re-evaluated between every parent operation when parenting multiple objects. This patch evaluates it only once and does all the parenting after. Since it is most of the work, this makes a big difference in large-ish files. For example, re-parenting 400 objects in a 4000 object file goes from 10 seconds to a few tens of milliseconds. I'm definitely not familiar enough with blender internals and all possible situations to know if this is actually safe or not. Pull Request: https://projects.blender.org/blender/blender/pulls/138616
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