[Zope] page templates and "python:"

[Claudio Battaglino]

Jens Vagelpohl ha scritto:

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> On 3 Jul 2006, at 15:09, Andreas Jung wrote:
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>>>
>>> <metal:block tal:define="my_value my_object/getValue">...</ 
>>> metal:block>
>>>
>>> <metal:block tal:define="my_value
>>> python:my_object.getValue()">...</metal:block>
>>>
>>
>> The main difference between both variants is that in path expressions 
>> getValue can be either an attribute or a method...so at least path 
>> expressions may have some overhead...you have to measure it.
>
>
> As far as I know path expressions have better performance. I don't 
> have the in-depth expression engine knowledge to explain why, but 
> that's been what everyone has said to me before.
>
> jens
>
>
Could it be that, using a Python expression, I have an overhead because 
Zope loads a Python interpreter each time it finds a "python:"?
If this is true then it is better to use path expression, if possible.

claudio :-)