Front page | perl.perl5.porters |
Postings from April 2007
Jerry D. Hedden wrote:
> While field hashes do a bit better than refaddr in get
> operations, stringification is the hands down winner! Why?
Rafael Garcia-Suarez wrote:
> Probably because IIRC field hashes have an additional overhead,
> setting magic, weakening references.
Is that applicable to 'set' and 'get' accessors?
sub get_a { $a{ $_[0] } };
sub set_a { $a{ $_[0] } = $_[1] };
The only things going on here are to convert the object to a
hash key and then get/set the value accordingly. The
stringified version is doing the same thing, but a whole
lot faster!
Jerry D. Hedden wrote:
> And, of course, all this pales in comparison to what
> Object::InsideOut already does.
Rafael Garcia-Suarez wrote:
> How does it work internally ?
In the fastest case, OIO uses arrays for fields and stores
the index inside the object's scalar:
sub get_a { $a[ ${$_[0]} ] };
sub set_a { $a[ ${$_[0]} ] = $_[1] };
It can use hashes for fields, but again, the speed
difference is still huge. I doubt anything will beat this,
but I thought that if field hashes performed reasonably
well, it would be worthwhile to add them as an optional
feature to OIO.
Rafael Garcia-Suarez wrote:
> Profiling anyone ?
I hope someone will take this up.
Thread Previous