zip piped : 3,89

unzip -p "C:\Users\admin\Desktop\10-million-combos.zip" | perl -ne "BEGIN{$n=0} $n++ if /123456$/; END{print $n}"

plain text : 5,16

type "C:\Users\admin\Desktop\10-million-combos.txt" | perl -ne "BEGIN{$n=0} $n++ if /123456$/; END{print $n}")

perl direct : 2,29

perl "demo.pl"