in reply to
Re: Re: Re: Slurping BIG files into Hashes
in thread Slurping BIG files into Hashes
Try presizing the hash - keys %lookup = 160_000;
If it is hash collisions, this might solve the problem.
dominus has an interesting bit at perl.plover.com called When Hashes Go Wrong.
Update: Meant to ask you to "print scalar %lookup;" after all is done. scalar %hash will give you the number of used buckets / number of allocated buckets. If the number of used buckets is low (like 1/16) all your hash items have been put in the same bucket!