Hold on. Do you really slurp a 4.5 GB file into memory? On anything with less than about 20 GB of memory that will cause thrashing like you wouldn't believe (err, ok, maybe you would - you've seen it)!

It looks like you are parsing HTML so you should take a hard look at modules like HTML::Parser to do a lot of the heavy lifting for you.

If you are not dealing with HTML, then at least nest the while loop in an outer while loop that reads a record at a time rather than slurping the whole file.

Perl reduces RSI - it saves typing

In reply to Re: Large file data extraction by GrandFather
in thread Large file data extraction by micwood

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