Oleg wrote:
>  More efficient?

Wow, I never knew that!  Thank you for pointing it out.  Here's an explaination 
for this efficiency:

    The dyad (+/ % #)\ computes the moving average and is now 
    implemented by special code for positive left arguments 
    and integer and floating point right arguments. 

    http://www.jsoftware.com/help/release/infixavg.htm

When I wrote up my response, I was only thinking about this special case:

    The dyad m u/\ y is now implemented by special code for 
    the cases where m is a positive integer and   
    
     + /\  boolean, integer or floating point y

    http://www.jsoftware.com/help/release/infixfin.htm


-Dan

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