Will Tebbutt

This is basically what @penelopeysm mentioned as an alternative that we considered -- see `(4) Alternatives considered` in her above post. There she discussed returning a `Tuple`, and you're proposing...

> But not always wanted, no? E.g. if you have a model that is nested 10 levels, you don't necessarily want to prefix all that. Not prefixing something which is...

Would you consider expanding the scope of this issue to a more general issue on analysing performance problems, and fixing them? e.g. how do I figure out what bit of...

Thanks for sorting this @vtjnash !

Correct. I'd suggest taking a look at the docstrings for `cov` and `FiniteGP`.