It would almost certainly be considerably quicker to query the names from the DB in bulk and build a hash in perl. And then just process your file against the hash.
A 10 million key hash should take 1.5 GB. And looking up 2 million keys against a 10 million key hash takes around 5 seconds.
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"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
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