I came across another implementation of R called FastR. It claims to improve R performance to a great degree. I am curious if anyone has tried it and how it feels.
Last I've heard, they were hard at work to make
data.table work which means that they don't work yet . Depending on your workflow, it might be a deal-breaker.
Also, Oracle doesn't have the best reputation, so whenever there are discussions of GraalVM (where this FastR implementation supposed to work), there are always quite a few people that don't touch it on principle, so again, depending on your convictions, that can be a deal-breaker too.