Example

> toc()
rlab: must call tic() 1st
> tic();
> toc()
       11
> tic(); a = rand(20,200); toc()
        2
> tic(); a = rand(200,200); toc()
       16
> tic(); b = inv(a); toc()
 2.39e+03
> 2390/60
     39.8
> // Yep, that took nearly 40 minutes.  Now, why did I want that ...