Cache Aware Single Core Version

[william-silversmith]

In testing, it seems that about 69% of the time my test volume was bound by memory latency. This would seem to indicate that a cache aware version could be ~2-3x faster.

[william-silversmith]

Not clear if this is possible. You might just end up exchanging latency on the core data for latency in the calculation on range and vertex.

[william-silversmith]

Might be able to make use of __builtin_prefetch for the Z axis (for g++ and clang).