and probably a tiny bit faster
Yep, you've got me there, and then some:
Rate OP other fishbot Joost
OP 293/s -- -21% -76% -92%
other 369/s 26% -- -69% -90%
fishbot 1205/s 312% 226% -- -68%
Joost 3723/s 1173% 908% 209% --
"other" was a solution using values with a regex. "OP" was a corrected key and regex version of the OP's code.
Update: Added OP-style solution to benchmark.
Benchmark code used:
use strict;
use warnings;
use Benchmark qw{ cmpthese };
our %a;
$a{ $_ } = "foo" for 1..1000;
$a{ 1 + int rand 1000 } = '' for 1..10;
cmpthese( -3,
{
Joost => 'scalar grep { $_ ne "" } values %a',
fishbot => 'scalar grep { $a{$_} ne "" } keys %a',
other => 'scalar grep { ! /^$/ } values %a',
OP => 'scalar grep { $a{$_} !~ /^$/ } keys %a',
}
);
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