scott wrote:

> Obviously the benefits will depend on many factors, like how similarly 
> sized your circles are, and what % of them intersect.

I would imagine it's quite possible that the extra time required to 
perform a square root operation is more than made up for by the decrease 
in unecessary work due to false intersections. Square root isn't *that* 
slow... But you'd have to measure it to find out for sure.

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