Hi Chad, I dont know the complexity of the algorithms behind the xint operations, but instead of making eager evaluation you could do lazy evaluation. You could define a DSEL which evaluates the expression x*y + z at once. it would be great if at the end w = x*y + z; resulted in only one allocation for the result of the expression, and a move to make the assignement. If given two integers i and j using n and m bits, you know the number of bits needed by i @ j, you can know the number of bits of x*y + z, isn't it? If in addition, the rhs expression resulted on a integer needing less bits than the lsh, you could do the operation directly on the lhs, avoiding any allocation! My 2cts, _____________________ Vicente Juan Botet Escribá http://viboes.blogspot.com/