Optimize my code =)

[Stanislav Blinov]

...And if I define opEquals as it was made by Robin, i.e. like 
this:


bool opEquals(ref const Matrix other) const pure nothrow {
     version (all) {
         if (dim != other.dim) return false;
         foreach(immutable i, const ref e; data)
             if (e != other.data[i])
                 return false;
         return true;
     } else {
         return (dim == other.dim) && (data[] == other.data[]);
     }
}


then the relevant benchmark on LDC flattens near zero time too x.x