Read more in my blog post.
Rebalancing is pretty slow right now, so initial list builds, appends, etc... take longer than they should. If you're reading this, I expect a patch. :)
Make a 1,000 node balanced conc list
C = conc:from_list(lists:seq(1, 1000)), ok.
Now do something expensive with it (on my system, this takes about 4s):
conc:foreach(fun(_X) -> timer:sleep(1000) end, C).