use strict;
use Benchmark qw(:all);

my %data = (
    Lore    =>'mipsumdo', ente    =>'squemoll',
    lors    =>'itametco', isod    =>'ioetnonu',
    nsec    =>'tetuerad', mmyf    =>'acilisis',
    ipis    =>'cingelit', augu    =>'eliberoi',
    Sedr    =>'honcusma', acul    =>'isodioat',
    ssai    =>'dmollisp', cons    =>'ectetuer',
    hare    =>'travelit', nisl    =>'nislquis',
    null    =>'amattise', feli    =>'sDonecma',
    nimq    =>'uisferme', gnar    =>'isusulla',
    ntum    =>'nequenul', mcor    =>'peridele',
    lase    =>'dduiDone', ifen    =>'dutfeugi',
    cbla    =>'nditmetu', atas    =>'emAliqua',
    svit    =>'aecondim', msed    =>'magnaado',
    entu    =>'mluctusa', lorn    =>'onummysa',
    ntem    =>'assaeuis', gitt    =>'isNuncne',
    moda    =>'nteaport', corc    =>'iMorbima',
    amii    =>'psumnonl', ttis    =>'blandits',
    eoAl    =>'iquamcon', emPh    =>'asellusq',
    dime    =>'ntumblan', uiso    =>'rciInfer',
    ditf    =>'elisPell', ment    =>'umturpis',
);

sub WithCopy {
    my $hashref = $_[0];

    my @dummy = @{$hashref}{'Lore','lors','nsec'};
}

sub WithoutCopy {
    my @dummy = @{$_[0]}{'Lore','lors','nsec'};
}

cmpthese(5000000, {
    'WithCopy'        => 'WithCopy(\%data);',
    'WithoutCopy'    => 'WithoutCopy(\%data);',
});

__END__

                Rate    WithCopy WithoutCopy
WithCopy    548908/s          --         -6%
WithoutCopy 581801/s          6%          --

[download]

In reply to Re^2: Trying to optimize de-referenced hash slice without scope variables... by meetraz
in thread Trying to optimize de-referenced hash slice without scope variables... by monsieur_champs

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