Issues

ZF-3280: Zend_Server_XmlRpc_Cache - does not improve performance

Description

[From matthew@zend.com] -- David Goodwin david@palepurple.co.uk wrote (on Thursday, 15 May 2008, 10:43 PM +0100):

I've written a (relatively) small Zend_XmlRpc_Server service and I'm
pleased with the architecture of the code itself; however, I now need to
see if I can boost performance.

The documentation [1] covers how the server definition can be cached
using Zend_XmlRpc_Server_Cache; unfortunately when I implemented this,
calling 1000 method calls goes from taking 1 minute 40s to 2m 40
seconds. Hardly a performance improvement!

Has anyone else here used the Zend_XmlRpc_Server_Cache functionality,
and/or have any numbers to report back re "before and after"
implementing it?

Unfortunately, the server cache does not do what I intended it to when I originally coded it. The problem with performance is due to the fact that it must both re-instantiate objects as well as perform reflection on all of them -- but in reverse order (reflection objects are what are cached).

I would like to address this in the future; would you be willing to put an issue in the tracker, so it doesn't get lost, but also so that I can ping you about testing?

In the meantime, you have a couple of options:

  • First, don't use the server cache
  • Make sure you are using an opcode cache
  • Consider setting up functionality to cache read-only methods, so that the XML-RPC server can be bypassed entirely for such calls.

Comments

Resolved in trunk. Usage remains the same. However, the server now stores the internal method mapping definition without requiring the Reflection objects used to generate it. This now nets a gain in performance when using Zend_XmlRpc_Server_Cache.

Changing issues in preparation for the 1.7.0 release.