[Python-Dev] Re: [Psyco-devel] Re: [Zope-Coders] Psyco release 0.4.0 (original) (raw)

Petru Paler ppetru@ppetru.net
01 Mar 2002 22:42:00 +0200

On Fri, 2002-03-01 at 18:56, Andreas Jung wrote:

Just run ab against a Zope 2.5.0 instance and tested the performance against a stupid PythonScript.

Results: without psyco: 116 requests/second with psyco: 33 requests/second Jup, Zope is about 3.5 times slower with psyco. Any explanations for this worse behaviour ?

Just a wild, wild guess: this could be related to Psyco not doing the regular interval polling, so PyThreadState_Swap() doesn't get called as often as it should, ZServer piles up requests, the worker threads get starved, and so on.

-- Petru Paler, http://www.ppetru.net