Compile-time difference

          Rate single double
single 30027/s     --    -0%
double 30160/s     0%     --

Run-time difference

            Rate single double
single 5968932/s     --   -13%
double 6893402/s    15%     --

            Rate double single
double 6218672/s     --   -12%
single 7062848/s    14%     --