And here is that threaded solution.

use strict;

use Config;
$Config{useithreads} or die "Recompile Perl with threads to run this p
+rogram.";

use threads;
use threads::shared;

use Time::HiRes qw ( time sleep);

our $starttime : shared;
our $linecount : shared = 0;
our $running : shared = 1;

sub progress {
    my $lasttime = $starttime;
    my $lastlinecount = 0;
    sleep(1);
    $| = 1;
    do {
        my $now = time();
        printf "\rline %d %8.1f avg lines per second %8.1f lines per s
+econd", $linecount, $linecount/($now - $starttime), ($linecount - $la
+stlinecount) / ($now - $lasttime);
        $lasttime = time();
        $lastlinecount = $linecount;
        sleep(.5);
    } while ($running);
};

$starttime = time();

our $thr1 = threads->new(\&progress);

while (1) {
    $linecount++;
    last if $linecount > 9999;
    sleep(0.001);
};
print "\n";
$running = 0;

$thr1->join();
[download]

---

---

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! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

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:
	&		&
	<		&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.