Just save the value and test before sleeping.

use strict;
use warnings;
use Time::HiRes qw/time sleep/;

sub negative_timer {
    my $max = $_[0];
    my @time_test;
    my $start = time();
    for (my $i = 0; $i < $max; $i++) {
        $start += 1;
        my $dt = $start - time();
        if ($dt > 0) {
            sleep $dt;
            $time_test[$i] = time();
        }
    }
    return @time_test;
}

[download]

Good Day,
    Dean

In reply to Re: The most precise second (timer) by duelafn
in thread The most precise second (timer) by tukusejssirs

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