cmpthese -1,{
    a=>q[
        LOOP:for(1..1000){ 
            next LOOP; 
        }
    ],
    b=>q[
        for(1..1000){
            next;
        }
    ]
};;
    Rate    a    b
a 7862/s   -- -14%
b 9195/s  17%   --