$ time ./perl6 -e 'my $s; for 1..10000 {$s+=1/$_**2};say $s'
1.64483407184806

real 0m38.387s
user 0m38.154s
sys 0m0.232s

$ time perl -E 'my $s; for (1..10000) {$s+=1/$_**2};say $s'
1.64483407184806

real 0m0.009s
user 0m0.008s
sys 0m0.004s