[boost] [units] conversion performance

12 Feb 2007


      AMDG

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

    static
    quantity<unit<System2,Dim1>,Y>
    convert(const quantity<unit<System1,Dim1>,Y>& source)
    {
        Y    val = source.value();
        static Y fac(compute_factor());
        val *= fac;
        return quantity<unit<System2,Dim1>,Y>::from_value(val);
    }

In Christ,
Steven Watanabe