[zeromq-dev] pub/sub topic matching on sender side

[Pieter Hintjens]

On Sat, Aug 14, 2010 at 2:19 PM, Martin Sustrik <sustrik at 250bpm.com> wrote:

> It is efficient. But being inside SUB socket it sends messages to a
> single destination only (the user). Thus the output from the filter is
> just a bit (pass/drop).
>
> If it's on the PUB side there can be several destinations to send the
> messages to, so the outcome of filtering would be rather a bit-vector.

Ah, right.  So basically something like the algorithm we used in the
OpenAMQ topic exchange, with your performance tweaks.

-Pieter