[Catalyst] Store something in the stash at startup

[Octavian Rasnita]

From: "Tomas Doran" <bobtfish at bobtfish.net>
>
> On 17 Aug 2010, at 06:27, Octavian Rasnita wrote:
>>
>> I load and store this object in the stash on each request in the 
>> Root::auto : Private method with:
>>
>> $c->stash(menu => $c->model('Menu'));
>>
>> But this would re-create the menu object on each request, and this  takes 
>> time.
>
> No, it wouldn't. The adaptor you showed has a lifetime of the 
> application, and so it won't be recreated each request.

Thank you all for remembering me this! I used Catalyst::Model::Factory 
somewhere else exactly because it doesn't create just a single object 
instance like C::M::Adaptor, but I have forgotten.

> > Also, even if you were creating an object every request (which you
> aren't), if you're worrying about this without numbers, then this is 
> premature opimisation.

Well, it is not exactly without numbers. I have tried
ab -n 200 -c 5 http://localhost/

The result was... 3 to 4 requests per second.

I commented the line that stores the menu in the stash (for not using the 
menu at all) and the same command line gave a result of around 33 requests 
per second, which is a very big difference.

So I think the buggy part is the module that creates the menu object from 
the data structure loaded in the configuration file.

I will first try to use the data structure directly in the TT template 
without creating an object from it.

If it would be too slow, I will try to "draw" the menu entirely in the 
template without using an external data structure, although I don't like 
this.

Thank you all very much for your help.

Octavian


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