Hello,

I notice that the method allowedContentTypes cost time when you have a lot of type in plone2.5.I don’t know if plone3 or plone4 are impacted of that. I have 120 types and the time of execution of context.allowedContentTypes is about 0.32sec.

The path of allowedContentTypes is :

allowedContentTypes -> portal_types.listTypeInfo -> for each content type: portal_types.isConstructionAllowed -> portal_types._queryFactoryMethod -> Products.Five.pythonproducts.patch_ProductDispatcher__bobo_traverse__ -> Products.Five.pythonproducts.product_packages

and Products.Five.pythonproducts.product_packages time call is 0,003s

When you have 100 content type only product_packages is responsible of 0,3sec , this method is a performance bottleneck.

So add this patch fix the problem :

from Products.Five import pythonproducts
old_product_packages = pythonproducts.product_packages
pythonproducts.product_packages =  forever.memoize(old_product_packages)

Regards Youenn

I just release a little tool to detect Memory Leak in zope2 call Products.MemoryProfiler .

It use heapy (http://guppy-pe.sourceforge.net/#Heapy) in internal. It’s just an interface to this tool.

It provide an http interface in zope control panel to see the current memory .

When you start profiling, you take an snapshot of the memory at instant t.
When you click to updateSnapshot, memory profiling  tell you what objects are added between the start and the updateSnashot click. It will be usefull to detect Memory Leak.
Each snapshot is store (as string) in MemoryProfiler to be consult later (link to the date).

The button clear db cache clear all zeo cache of all mounting point so you can see the impact of the memory of those cache.

For windows users, you must compile guppy. There is egg for python 2.6 but
no for python 2.4. I have fatal error with Mingw to compile guppy. I hope that we have soon a binary egg to for python 2.4.

I hope that this tool give to us usefull  information to the memory consume by zope.