Sobhan Mohammadpour

> Can we do temporaries in the row! one? That might be faster than the double transpose. Allocate similar(x) then just copyto! the vectors in reverse order. not sure i...

Yes, it's specific to this package. It converts the last argument of the macro to a matrix with fixed pattern if any of the other arguments have fixed pattern On...

Also, are you using julia 1.9? because it's julia 1.9 thing.

you have to make pull request to merge into the backport-1.6 branch and one for the main branch.

is this even supported in SPQR? i couldn't find anything in the user doc

@Wimmerer do you think this would be a good feature to add?

doesn't CSparse use zero based indexing? so any call to CSparse needs to be converted to a 0 based indexing?

> For sparse I would argue to return a SparseMatrixCSC as well, but legacy may suggest otherwise I think it's a good to just expect an AbstractMatrixCSC, changing it will...

It's in this package ... `FixedSparseCSC`

https://github.com/JuliaSparse/SparseArrays.jl/blob/1c4670945884a863922757c17d700dbd1e2e53c3/src/sparsematrix.jl#L62