I second space_monk's suggestion of using hashes keyed on the location_id. The following uses two hashes of arrays of hashes to handle multiple 'records' having the same location_id:
use strict;
use warnings;
use Benchmark qw(cmpthese);
my %subnets;
my %filers_info;
my @subnets = (
{
'id' => '1',
'location_id' => '30',
'subnet' => '255.255.255.0'
},
{
'id' => '2',
'location_id' => '13',
'subnet' => '255.255.254.0'
},
{
'id' => '3',
'location_id' => '19',
'subnet' => '255.255.0.0'
},
);
my @filers_info = (
{
'id' => '1',
'location_id' => '19',
'info' => 'blah1',
},
{
'id' => '2',
'location_id' => '30',
'info' => 'blah1',
},
{
'id' => '3',
'location_id' => '30',
'info' => 'blah1',
},
);
push @{ $subnets{ $_->{'location_id'} } }, $_ for @subnets;
push @{ $filers_info{ $_->{'location_id'} } }, $_ for @filers_info;
sub original {
my @total_filers;
foreach my $subnet (@subnets) {
my @found_filers =
grep { $_->{'location_id'} == $subnet->{'location_id'} } @fi
+lers_info;
push @total_filers, @found_filers;
}
}
sub hashed {
my @total_filers;
exists $subnets{$_} and push @total_filers, @{ $filers_info{$_} }
for keys %filers_info;
}
cmpthese(
-5,
{
original => sub { original() },
hashed => sub { hashed() },
}
);
Dumper output of @total_filers from sub hashed { ...:
$VAR1 = [
{
'info' => 'blah1',
'location_id' => '30',
'id' => '2'
},
{
'info' => 'blah1',
'location_id' => '30',
'id' => '3'
},
{
'info' => 'blah1',
'location_id' => '19',
'id' => '1'
}
];
Benchmark results:
Rate original hashed
original 282623/s -- -64%
hashed 780346/s 176% --
Hope this helps!
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