This little Perl Benchmark shows that its better to iterate through an array as to manipulate via shift.For more about shift look at Perl array pop, push, shift, unshift.
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#!/usr/bin/perl use strict; use warnings; use Benchmark qw(:all) ; cmpthese(-1, { 'shift' => sub {my @var = (1..4);print shift(@var); }, 'iterate' => sub {my @var = (1..4);print $var[0]; }, }); |
We see its better to iterate as to shift from an array:
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shift 1147836/s -- -4% iterate 1191563/s 4% -- |
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