[erlang-questions] Shared memory and message passing

Joel Reymont <>
Wed Sep 6 00:18:34 CEST 2006


I thought Erlang as it is right now _does_ copy data. Am I mistaken?

Why the talk about about copying binaries, etc. otherwise?

On Sep 5, 2006, at 10:36 PM, Robert Virding wrote:

> I agree with Joe, the Erlang implementation can use whatever  
> mechanisms it likes just as long as the semantics are unchanged.  
> Actually this is no problem as Erlang does not allow updating of  
> data. Single heap memory models never copy data from one process to  
> another, they just pass the reference. Sending messages is an O(1)  
> operation.

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