If you just want to check for the presence of one of a group of IPs it'd be much more efficient to build a hash of the IPs up front, and then parse out the IP from each record and do an exists $wanted{ $curIP } to tell if it's interesting or not.

In reply to Re: Efficient Way to Parse a Large Log File with a Large Regex by Fletch
in thread Efficient Way to Parse a Large Log File with a Large Regex by Dru

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