[xfs]

I'm not sure what you mean by arbitrary? What parsing in this case means e.g. turning a string of digits into a ieee754 float number in memory. I think this project is meant to accelerate this part with SIMD, but a greater improvement can be obtained by simply not doing this for as much data as possible. If the actual materialized data constitutes a small part of the original, there should be ways to do minimum work for the rest.