Because, by default, every windows perl build is configured with large file support.
If only you were right... Tragically, anything older than 5.8.4 compiled with Borland can't use large files at all, whatever it does "by default."

Anyways, let's see what the OP's actual problem is before allocating the egg to someone's face.

In reply to Re^6: reading from a huge file by educated_foo
in thread reading from a huge file by esddew

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