#!/usr/bin/perl use strict; use warnings; my @printables = map chr, 33 .. 126; # random string 30 characters long sub randstr { join '', map { $printables[rand(@printables)] } 1..30 } use Devel::Size qw(size total_size); sub commas { my $str = ''.reverse shift; return scalar reverse join ',', grep length, split /(.{3})/, $str } my %hash = ( randstr => randstr ); for (0..5) { my $count = scalar keys %hash; print commas($count), " elements: ", commas(total_size\%hash), " bytes\n"; for (1..9 * $count) { my $s = randstr; $hash{$s} = randstr; } } my $count = scalar keys %hash; print commas($count), " elements: ", commas(total_size\%hash), " bytes\n";