It looks like you are recompiling each regular expression once for each line of input to be scanned. Compiling regular expressions can be expensive, so performance might be improved if you pre-compile all the regular expressions.

http://www.stonehenge.com/merlyn/UnixReview/col28.html provides a nice introduction to some of the options for compiling regular expressions.

In reply to Re: Splitting Apache Log Files by ig
in thread Splitting Apache Log Files by cmm7825

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