On Wed, Jan 4, 2012 at 16:38, Zabrane Mickael <zabrane3@REDACTED> wrote: > Is the call to length(L) traverse all the list ? > or is it something already pre-computed internally (i.e constant time = > fast)? May be out of interest: http://www.lshift.net/blog/2010/02/28/memory-matters-even-in-erlang Cheers, Marek