Another talk on the difficulty of optimising R is this fantastic one by Jan Vitek: https://www.youtube.com/watch?v=HStF1RJOyxI https://www.youtube.com/watch?v=H

Another talk on the difficulty of optimising R is this fantastic one by Jan Vitek: https://www.youtube.com/watch?v=HStF1RJOyxI https://www.youtube.com/watch?v=HStF1RJOyxI Also, my favourite R trick: foo <- function() {rm(foo, envir=environment(foo))}