i read that using grep is not advisable for huge files

Someone lied to you.

Maybe lied is a bit strong, they we probably thinking of this:
grep /fred/,<FILE>;

[download]
which loads the entire file into memory (or at least, tries to).

In reply to Re^2: find a string and count of its occurence in a text file by cdarke
in thread find a string and count of its occurence in a text file by new@perl

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