Thanks for the tip. There is some scope for batching, I believe, and I hadn't thought of sorting. I'll write a new root node in the next day or so with details on the full problem.

Update: the new root node: High Performance Game of Life

In reply to Re^4: Fastest way to lookup a point in a set by eyepopslikeamosquito
in thread Fastest way to lookup a point in a set by eyepopslikeamosquito

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