[erlang-questions] On selective receive (Re: eep: multiple patterns)

Mats Cronqvist <>
Mon Jun 2 12:59:11 CEST 2008


Ulf Wiger wrote:
> I would really like to discourage people from avoiding
> selective receive because it's "expensive". It can be
> expensive on very large message queues, but this is
> a pretty rare error condition, and fairly easily observable.
>   

  i think the "issue" of how the emu deals with huge in-queues is pretty 
uninteresting.
  in my personal experience, every single time this has come up the real 
problem has turned out to be lack of proper flow control (typically 
using {active,true} sockets). having 100k messages in an in-queue is not 
a realistic use case.
  the fact that this is not, afaik, particularly well documented is of 
course a problem.

  mats



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