Nothing
ffast = function(x) rnorm(1)
fslow = function(x) {
Sys.sleep(0.1)
rnorm(1)
}
z = 1:10
r1 = lapply(z, ffast)
r2 = lapply(z, fslow)
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.