Mateusz Baran

Yes, I think dispatching mixed-type multiplication to BLAS would be a good idea and fits the scope of `StaticArrays.jl`. I can review a PR that adds that. Mixed calls could...

Maybe HybridArrays.jl: https://github.com/JuliaArrays/HybridArrays.jl is what you need?

Any benchmarks would heavily depend on the use case so I think you would have to check on your workflow. `HybridArray`s are mostly a more convenient variant of the `Array`-of-`SArray`s...

HybridArrays currently doesn't seriously support matrix multiplication but it shouldn't be too hard to add. I was focusing on getindex, setindex and broadcasting along arbitrary dimensions when writing HybridArrays. Where...

Thanks for the link, that's good to know! I don't have the capacity to work on such matrix multiplication myself but I'm open to reviewing and merging changes to HybridArrays.jl...

There are also algorithms designed specifically to deal with missing data, for example: https://arxiv.org/pdf/1201.2577.pdf .

This looks like a good approach, I could review and merge a pull request that adds this. I don't personally need this functionality at the moment so I'm not going...

Probably duplicate of #878? See also #879.

It would be great if we actually had non-ambiguous documentation about what is and what isn't type piracy so that we can be sure what is and what is not...

1. The current interface is inspired by the one from [Interpolations.jl](https://github.com/JuliaMath/Interpolations.jl). I agree that `method` would be better as a second argument but `Simple` and `Uncorrected` aren't really useless. They...