2b4666b17b
Add an offset indices utility to do fill constant size new offsets in parallel, which was already done in the duplicate elements node. For example, filling poly offsets for a new part of a mesh that is only quads. In the extrude node this was single-threaded before, so the new poly offsets is about 10x faster, saving about 10 out of 157 ms when extruding 2 million faces.