""""""""""""But also now that I see what your test file is like, a "sphere grid" is actually a particular kind of case since each sphere only has a single edge in it. So your test file happens to be heavy on surface drawing and light on edge drawing, and it's actually edge drawing that consumes the most CPU and also therefore has the most to benefit from the multi-core use as well.""""""""""

Rat's... We already talked about that... Shouldve known.... Never mind.