Because SO is a bit slow lately, I'm posting an easy question. I would appreciate it if big fishes stayed on the bench for this one and give rookies a chance to respond.
Sometimes we have objects that have a ridiculous amount of large list elements (vectors). How would you "unlist" this object into a single vector. Show proof that your method is faster than unlist().
c() has the logical argument recursive which will recursively unlist a vector when set to TRUE (default is obviously FALSE).
l <- replicate(500, rnorm(1e3), simplify = F)
microbenchmark::microbenchmark(
unlist = unlist(l, FALSE, FALSE),
c = c(l, recursive = TRUE, use.names = FALSE)
)
# Unit: milliseconds
# expr min lq mean median uq max neval
# unlist 3.083424 3.121067 4.662491 3.172401 3.985668 27.35040 100
# c 3.084890 3.133779 4.090520 3.201246 3.920646 33.22832 100