My first thought was "this sounds like a job for a hash".
next if exists( $filesToSkip{$filename} );
The retention between runs requirement just means that you need to save the hash to a file and load it back on startup:
Try Storable for that.

In reply to Re: mark unreadable file so a loop does not read the file again by SuicideJunkie
in thread mark unreadable file so a loop does not read the file again by newPerlr

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