[mod_python] PXTL processing performance issue

Hello friends,
I am working on developing a website using dbxml , mod-python , pxtl and 
python programming.

I am using PXTL template processing language with mod-python
I want to know are there any known issues regarding performance .
I am using following versions of software

1) dbxml -  2.1.8
2) python - 2.3.4
3) mod-python - 1.3.4
4) apache 2.0.52
5) Kernel version-2.6.9-5.0.5-EL
6) Operating System - CentOS 4.0
7) CPU - P4 2.26GHZ
8) Ram Size - 1 GB RAM
9) Swap Memory -1 GB
10) PXTL 1.4

Also, i process the .px file in my mod-python handler as follows
def handler(req):
....
....
....
import pxtl
pxtl.processFile(x.px ,writer = req )

Please let me know .
Thanks in Advance
Regards ,
Ajinkya