[joshuaellinger]

I wrote something like this but used a GPU to do all the heavy lifting. It was mostly just to learn how Numba's GPU support worked so I never benchmarked it. It was very fast.

I think most people don't appreciate that CSV parsing is actually a compute-bound problem because the rows and column positions are known in advance.

Overall, I'm not sure the complexity justifies the performance gains unless parsing is in your critical path.