Elixir Sleep / Wait for 1 Second

How to sleep / wait for one second?

Best I could find was something like this (in iex):

IO.puts "foo" ; :timer.sleep(1); IO.puts "bar"

But both of my puts happen with no delay.

Timer uses milliseconds not seconds, update to:

IO.puts "foo" ; :timer.sleep(1000); IO.puts "bar"

Documentation of :timer in Erlang's doc:

> Suspends the process calling this function for Time amount of > milliseconds and then returns ok, or suspend the process forever if > Time is the atom infinity. Naturally, this function does not return > immediately.

http://erlang.org/doc/man/timer.html#sleep-1

Since Elixir 1.3 you can use Process.sleep/1:

Process.sleep(1000)

The argument is in milliseconds.