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From: Matthias Schabel (boost_at_[hidden])
Date: 2007-02-12 16:24:52

> Unless some precision benefit accrues from
> multiplying the factors for each dimension
> individually, it would be better to compute
> the complete factor for the conversion once


Good point - I don't think there's a precision issue, but I should
think about
it some more. I'll take a look at this later this evening. I guess it
can be rendered down
even more:

     convert(const quantity<unit<System1,Dim1>,Y>& source)
         static Y fac(compute_factor());

         return quantity<unit<System2,Dim1>,Y>::from_value

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