CSC kills the prospect of multithreading. Shouldn't Julia use CSR?

[gdalle]

I can’t answer as to the reasons of the choice, but I believe this thread is relevant:

What to do since CSR matrixes are not in Sparse Arrays?

Viral B. Shah discussed (in 2015!) why CSR matrixes were not included in Sparse Arrays: link. The justification makes sense, but I now find myself wishing there was an easy way to access CSR sparse array. I just want to get stuff done, and I don’t care much about the elegance of the abstraction design at the current time. Does anyone have suggestions for an easy work-around so that I can use a CSR matrix? A few “solutions” I’ve considered: Bite the bullet and implement a CSR matrix from the …

And it looks like someone coded the multithreaded version in Julia too:

GitHub - BacAmorim/ThreadedSparseCSR.jl: Multithreaded mat-vec multiplication...