Stephan Rave

I would agree with @pmli. It would probably be wise to have a 'performance settings' document somewhere. Or something like a global '-ffast-math' which disables all checks and such. To...

Won't get this done before the release.

Also moving to next release.

Generally speaking, we should definitely support multilinear operators in some form. Two possible options I see without having thought too much about it: 1. Add a new Interface class `MultilinearOperator`....

I do not think that `apply_adjoint` is an argument since many methods of `OperatorInterface` are not required to be actually implemented (e.g. there is no `apply_adjoint` for nonlinear operators). Maybe...

I see. In case `H` comes from a PDE solver, it should usually be possible to evaluate H.apply((None, V, W)) or `H.apply((U, V, W))`. However, `H.apply((V, W, None))` or `H.apply((V,...

I think this needs a broader discussion. Maybe we should look for places in pyMOR where this would be useful. Regarding implementations, I myself have enjoyed using [tqdm](https://github.com/tqdm/tqdm), which supposedly...

I would assume that it is quite non-trivial to write a progress bar that reliably works in all terminals. If it's more like 20 lines of code, I see no...

> Maybe we can make tqdm optional and not mandatory? How would that work. You mean that the entire progress bar is optional and does not appearch when tqdm is...

@renefritze do you know how tqdm behaves in this case? Maybe it is smart enough to see that it is not connected to a proper terminal? > Usage in in...