in reply to Re^2: hash slice ? No thanks, I'm about to return...
in thread hash slice ? No thanks, I'm about to return...

You surprised me with this, but: 
            Rate return no ret
return 4682554/s     --   -30%
no ret 6642457/s    42%     --

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Is what i got from: 
use Benchmark qw( cmpthese );

my %hash = (1, 2, 4, 6, 43, 32, 5, 6, 6, 43, 3, 54, 5, 1);

cmpthese(0, {
    'return' => sub { return \%hash },
    'no ret' => sub { \%hash },
});

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Re^4: hash slice ? No thanks, I'm about to return...
by Anonymous Monk on Feb 19, 2005 at 20:54 UTC
    Surprising but pointless. Even the "slow" explicit return runs at 4 million iterations per second. Don't waste your time trying to use this as a real optimization.
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In Section Meditations