Hi Lotus1,
If so there is a problem with concatenating all the output into a scalar. $matched_lines could end up holding the whole huge file. One possible solution is to replace $matched_lines .= $match.$/; with print $fh $match.$/; Just print incrementally.

Not so, am afraid your suggestion will further affect the performance of the script, because the print function would be call as many times as the strings matches, meanwhile with the scalar used no call is placed.
Using a Profiler (NYTProf) made that very clear.
Try it.

If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me

In reply to Re^3: File handles in regular expressions by 2teez
in thread File handles in regular expressions by vikasdawar

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