Well in looking at it, I'd say your time calcs are pretty good. Really throwing modules at that will only slow you down.

OTOH I'd probably not slurp the whole file just for this. 

my ($min,$max);
$min=$max=<LOG>;
while (my $ts=<LOG>) {
  $min = ($min gt $ts) ? $ts : $min;
  $max = ($max lt $ts) ? $ts : $max;
}

[download]

You can use the string order sorting to your advantage with that timestamp and not load the whole file into memory. Handy trick...

--
$you = new YOU;
honk() if $you->love(perl)

In reply to Re: Efficiently calculate the difference between TimeStamps in LOG by extremely
in thread Efficiently calculate the difference between TimeStamps in LOG by Anonymous Monk

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.