Have an old, creaky Benchmark module that doesn't export cmpthese? Feed the timethese output to this snippet, and your problem is solved. :-)

#!/usr/bin/perl

while (<>) {
    if (/^Benchmark: timing (\d+)/) { $iters = $1 }
    else {
        /(\w+): .*?(\d+\.\d+) CPU/i or warn,next;
        $rate{$1} = $iters/$2;
    }   
    print;
}
my @order = sort {$rate{$a} <=> $rate{$b}} keys %rate;
print join "\t","", "Rate", @order;
print "\n";
foreach $type (@order) {
    printf "$type\t%6.2f/s",$rate{$type}; 
    foreach $compare (@order) {
        unless ($compare eq $type) {
            $ratio = $rate{$type} / $rate{$compare};
            printf "%7.0f%%", $ratio > 1 ? 100*($ratio - 1) : -100*(1 
+- $ratio);
        } else {
            print "      --";
        }
    }
    print "\n";
}

[download]

In reply to Emulate Benchmark::cmpthese with older perls by ChemBoy

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.