Thanks for that, link seems down unfortunately. I use data.table a lot but would happily switch if the dplyr family of packages work.

Would love to use this in Rstudio for exploratory analysis which would also need ggplot to work. Quite often have to cancel long running tasks when exploring a data set, so even if its a bit slower for interactive tasks but much faster for longer running tasks would be huge. E.g. typical interactive finished in 1 second instead of 50ms, but large loops that would take an hour finish in 10 minutes.