> But as far as I'm aware the memory for a message in Erlang is shared between threads - it's only local variables that use private memory No, the messages are

> But as far as I'm aware the memory for a message in Erlang is shared between threads - it's only local variables that use private memory No, the messages are truly copied: http://jlouisramblings.blogspot.dk/2013/10/embrace-copying.html http://jlouisramblings.blogspot.dk/2013/10/embrace-copying.h... edit: the exception being large binaries apparently