#!/usr/bin/perl
use warnings;
use strict;
use feature qw{ say };
use Benchmark qw{ cmpthese };
my %hl;
@hl{1001 .. 2000} = (1) x 1000;
our %hg = %hl;
our ($el, $vl, $eg, $vg) = (0) x 4;
die unless $hl{1001};
die unless $hg{1001};
cmpthese(-1, {
exist_l => q{ ++$el if exists $hl{1001} },
value_l => q{ ++$vl if $hl{1001} },
exist_g => q{ ++$eg if exists $hg{1001} },
value_g => q{ ++$vg if $hg{1001} },
});
say join "\n", "el: $el", "vl: $vl", "eg: $eg", "vg: $vg";
####
Rate value_g exist_g value_l exist_l
value_g 17625636/s -- -4% -47% -53%
exist_g 18303545/s 4% -- -45% -51%
value_l 33363781/s 89% 82% -- -11%
exist_l 37417325/s 112% 104% 12% --
el: 0
vl: 0
eg: 23229990
vg: 23229990
##
##
Rate value_g exist_g value_l exist_l
value_g 31977080/s -- -2% -8% -19%
exist_g 32733979/s 2% -- -6% -17%
value_l 34737228/s 9% 6% -- -12%
exist_l 39658833/s 24% 21% 14% --