So far a simple lookup based on a sorted array (each element storing the id of the range that covers it) hasn't thrashed my computer, but I am still testing. If this fails I will try a binary search (what I meant by 'guess and home in'... no CS background...!). Thanks again.

Just a something something...

In reply to Re^3: Range overlap (with a lot of ranges) by BioLion
in thread Range overlap (with a lot of ranges) by BioLion

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