Comment by Bootvis

I'm working on my typed, fast data frame language Ibex: https://github.com/bobjansen/Ibex

It is usable stand alone but also through an R package:

https://bobjansen.net/faster-than-data-table-introducing-ibe...

It performs better than data.table in my benchmarking on a wide array of tasks and is competitive with Polars on low core counts.