> >>
>http://www.wetware.com/drieux/CS/lang/Perl/Beginners/BenchMarks/complexArrayHash_v_loop.
> >> txt
> >>
> >> for the details on the comparison....
> >>
> >> looks like the double loop is faster.... but it may not be
> >> in some other configuration of data...
> >
> > The dereference is probably wasting cycles, why not bring that outside
> > the loop and save some time. I suspect that puts the double loop even
> > further ahead.
>
> Benchmark: timing 1000000 iterations of doubleLoop, dullWay, pushList...
> doubleLoop: 242130.75/s (n=1000000) # $hash->{key}
> dullWay: 238663.48/s (n=1000000) # $hash{$key}
>
> which is not what I had expected
You sure about that? Seems very counter-intutive, you did remember that
deferencing should save clock cycles when in a loop. E.g.
my %hash = %{ $hash };
print $hash{$_} for 0..1000;
Unless, of course, that the -> case is optimised in some devious way or
dereferencing is deliberately crippled for our enjoyment. use Benchmark
Jonathan Paton
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