Removing this would probably help performance a bit as it is totally unnecessary: 

 
if(exists($edgeHash{$a})){
    push @{$edgeHash{$a}}, $b;
}else{
    push @{$edgeHash{$a}}, $b;
}

[download]
Unless this is a mistake, either condition of the if test does the same thing.

-----------------------------------
Frank Wiles <frank@wiles.org>
http://frank.wiles.org

In reply to Re: H of A optimization by ides
in thread H of A optimization by abitkin

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