On a really bloated file, that's the thing to do because the routine takes an item and then compares it to every other one until it finds a match. When you pare down the selection set, it really speeds up the processing time.
On a really bloated file, that's the thing to do because the routine takes an item and then compares it to every other one until it finds a match. When you pare down the selection set, it really speeds up the processing time.
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