[OSM-dev] Minute Diffs Broken

Tom Hughes tom at compton.nu
Tue May 5 22:34:34 BST 2009

Frederik Ramm wrote:

> Perhaps this could be done internally: User uploads new relation; Rails 
> goes through the elements of that new upload, and checks whether these 
> elements were already in the previous version. If yes, no further check 
> is required (because the previous relation is assumed to have only valid 
> members), so we only need to check those members that are new.

Except the whole point is to avoid looking up all the members... Once 
we've looked them up checking if they're still visible is cheap.


Tom Hughes (tom at compton.nu)

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