Re: [eigen] PyEigen 0.1 released

[Jussi Lepistö <jussi.lepisto@xxxxxx>]

Hi Gael,

> nice job, I'm sure many users will be very happy to see this
> project.

Thanks :)

> meaning the overhead of such a wrapper is largely dominated by calls
> to operator new. So maybe the conclusions of that could be: - is
> there a way to reduce such heap allocations ? and if not: - for the
> user prefer "inplace" operators whenever it is possible - functions
> like add(a,b,r) doing r = a+b would be ugly but much faster than r =
> a+b, well, unless there is a way in python to map r = a+b to
> add(a,b,r) ? - I'm only nitpicking ? ;)

Yes, I'm aware there might be overhead with creating Python & Eigen 
objects. I'm planning to see if there's room for optimization there in 
the future. Note that currently PyEigen does have inline operators too, 
eg. a *= b, maybe I should benchmark them separately.

I'll also have to see how the module will be used in practice to see if 
*= style inline operators are enough or if I should add "mul(a, b, r)" 
style methods. Mapping functions that way can't be done due to the 
nature of Python.

Thanks for the input in any case, it's appreciated!

-Jussi