in reply to RE (tilly) 3: sort performance
in thread sort performance

I suspect that the optimizer is just removing the whole $foo bit from "stupid" for you.

I was wondering if $a->[1] would be much faster than $hash{$a}{this}. I didn't think it would be by a big enough factor.

If you want raw speed here, create a side array for comparison and sort a list of indices:

my @list= keys %hash; my @sort= map { $hash{$_}{this} } @list; my @sorted= @list[ sort { $sort[$a] cmp $sort[$b] } 0..$#sort ];
        - tye (but my friends call me "Tye")