> Applied and thank you a lot for your help - its highly appreciated!
> - Hauke
> On Fri, Feb 26, 2010 at 6:27 PM, Eamon Nerbonne <emn13@xxxxxxxxxxxx
>> As mentioned in the forums
>> on microsoft's compiler there's a performance regression in eigen3
>> concerning subtraction of VectorXd's (and probably other matrices with other
>> cheap operations too). The appropriate ei_assign_impl isn't always inlined,
>> and since the operation is otherwise cheap; the function call overhead is
>> quite significant. Gcc seems to inline the function; but MSC does not when
>> vectorization is on (EIGEN_DONT_VECTORIZE not defined). Replacing the
>> "inline" keyword with the EIGEN_STRONG_INLINE macro resolves the problem.
>> Attached: patch.