__END__
Benchmark: timing 1000000 iterations of m//, tr...
       m//: 57 wallclock secs (54.53 usr +  0.07 sys = 54.60 CPU) @ 18315.02/s (n=1000000)
        tr:  1 wallclock secs ( 1.92 usr +  0.00 sys =  1.92 CPU) @ 520833.33/s (n=1000000)
        Rate   m//    tr
m//  18315/s    --  -96%
tr  520833/s 2744%    --