A similar problem was discussed in The most precise second (timer).

If you don't need to be almost precise, something like this might be good enough: 

#! /usr/bin/perl
use warnings;
use strict;
use feature qw{ say };

use Time::HiRes qw{ time sleep };

sub func { sleep rand 0.05 }

my $t0 = 0;
while (1) {
    if (time - $t0 >= 0.1) {
        say $t0 = time;
        func();
    }
}

[download]
On my machine, it shows: 
1597188470.0211
1597188470.1211
1597188470.2211
1597188470.3211
1597188470.4211
1597188470.52111
1597188470.62111
1597188470.72111
1597188470.82111
1597188470.92111
1597188471.02111
1597188471.12111
1597188471.22112
1597188471.32112
1597188471.42112
1597188471.52112
1597188471.62112
1597188471.72112
1597188471.82113

[download]

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re: Call function no more than every 0.1 seconds by choroba
in thread Call function no more than every 0.1 seconds by zapoi

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