foreach my $obj (%{$href})
# This dereference ^ causes a deep copy to be made
actually, this is more accurate: 
foreach my $obj (%{$href})
     #here ^ is the copy

[download]
If you check the ref()-iness of $obj, you'll find that there isn't any at all. The appropriate value is copied into $obj on each run of the loop. I'm not at all sure what it is you're trying to solve with this, but if you need access to the key/value pair without the big, horrendous copy, maybe something like this:
foreach my $key (keys %{$href})
{
  #do what you need with $key and $href->{$key}
}

[download]
Hope you find this useful!

~Cybercosis

nemo accipere quod non merere

In reply to Re: Re: Perl Optimization by Cybercosis
in thread Perl Optimization by bikeNomad

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