bench2 results

[Marc Lehmann]

On Wed, Dec 01, 2010 at 02:49:29PM -0300, José Micó <jose.mico at gmail.com> wrote:
> >Could you post the benchmark table as a table? As it is now it's very hard
> >to read.
> 
>  name                 sockets   create    request
>  EV                      16      34.48      13.37
>  POE::XS::Loop::Poll     16      34.24      13.40
>  POE::XS::Loop::EPoll    16      34.36      13.20
>  Perl                    16      44.49      24.44
>  Glib                    16      56.12      30.92
>  Event                   16     149.61      69.43
>  POE                     16     400.60     343.99
> 
> The Perl backend is faster than any other backed, excepting EV?

Yes, this particular benchmark doesn't depend on a scalable kernel
interface much (i.e. for few active fds and many inactive ones), so
select() (used by the perl backend) does quite well.

(One also has top keep in mind that in many real-world situations select()
indeed performs much better than epoll).

The purpose of this benchmark is to illustrate this in the specific case
of a small-sized server.

- Glib is slower because it's the prime example of how to get even C
  dog-slow (it goes through all watchers multiple times in each iteration,
  and calls a lot of methods that do very little).

- Event is slower because of the enourmous overhead (multiple dynamic
  method calls) it is implemented with (but it beats Glib single-handedly
  when the number of watchers increase)

- Looking at your POE::XS::* numbers it's virtually certain now that
  all you did is benchmark EV under a different name (the results are
  basically identical). To see what went wrong one would need to see how
  you changed the benchmark to use those modules.

  An obvious problem would be how you keep POE from automatically loading
  these modules, so my guess is that POE::XS::* is really EV, while your
  POE benchmark is really POE+POE::XS::Loop::Poll/POE::XS::Loop::EPoll.

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