Is there a more effective way to read from a file, but not store it in the memory? I'm basically reading from a huge file, and doing some work on it. As it stands, it is taking me approx 10 seconds just to read from the file (that's about 10 seconds to long). Anyway, to help ease what is needed, this is roughly what I need to do:

read from the file
manipulate the line
compare the line with external info
get the second line if info is not correct, or exit loop if it is correct.

This is some basic sample code: 
open(FH, "/path/to/file") || die "Can't open file: $!";
my @file = <FH>;
close FH;

foreach my $file (@file){
     if($file eq $external_info){
          print "great\!";
          last;
     }
}

[download]
Thanks for any help

In reply to Reading from file, not to memory by FireBird34

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.