Bruno Turcksin

Have you tried configuring Kokkos with `-D Kokkos_ENABLE_HIP_MULTIPLE_KERNEL_INSTANTIATIONS=ON`? Sometimes that helps. What's the value of `NTHREADS`? I wonder if the difference between the `RangePolicy` and the `TeamPolicy` version is due...

We tend to use larger block size in the `RangePolicy`, so that might be a reason why it is slower than the `TeamPolicy`. Can you share the definition of `position`...

> In particular, is there a reason why this wasn't allowed before, or was it just a limitation at the time this piece of code was written? We were worried...

You pushed your build directory. You need to remove it.

Since we had to reimplement `Iota` several times, it makes sense to move it to ArborX. I am also in favor of moving `ExtractIndex` to ArborX. > Because we won't...

> I'm not opposed to moving Iota to ArborX::. Why did you need to implement it? I meant moving Iota inside the library. It's fine in the current namespace. >...

This is more than I expected but it's still worth to have something like this available for new users. We should make it clear that by switching from the simplified...

My worry is that someone does a performance comparison between ArborX with the simple interface and another library. As long as we find a way to make that clear, I...

The current situation is unacceptable. It's just too hard to try ArborX. We can add a note like [Adios](https://adios2.readthedocs.io/en/latest/components/components.html) does

> Not sure it is a good idea When updating the wrappers for deal.II, we realized that there is a lot of boiler code to write with the new interface....