Thanks BrowserUK,

I had a read up on Memoization and came to the same conclusion. However I realised I'd implemented it in another recent project without actually knowing what it was!

Regards
Rich

In reply to Re^4: Reducing memory footprint when doing a lookup of millions of coordinates by richardwfrancis
in thread Reducing memory footprint when doing a lookup of millions of coordinates by richardwfrancis

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