Write web apps in Python?

[Bruno Desthuilliers]

Adam Tauno Williams a écrit :
> On Mon, 2010-04-19 at 15:15 +0200, Bruno Desthuilliers wrote:
>> Gilles Ganault a écrit :
>>> On Thu, 15 Apr 2010 12:41:56 +0200, Bruno Desthuilliers
>>> <bruno.42.desthuilliers at websiteburo.invalid> wrote:
>>>> The PHP execution model (mostly based on CGI FWIW) tends to be a bit 
>>>> unpractical for non-trivial applications since you have to rebuild the 
>>>> whole world for each and any incoming request, while with a long-running 
>>>> process, you load all your libs, parse your config etc only once.
> 
> There are numerous ways to efficiently retains state between page views
> [session id + memcache or even just shared memory].

Never played with shared memory in PHP. Sessions will at best retains 
"state" (data), and it's not a free lunch neither (you'll still have to 
reload that state one way or another). And you'll still have to parse 
included .php files on each and every request.

> 
>>> Apart from the ease of having the application run at all times, I'd be
>>> curious to read about an application that was written in PHP and then
>>> a long-running process and see if performance improved.
>> I'm not sure there's a way to do such a thing in PHP,
> 
> There isn't.  [Speaking as an ~15 year administrator and developer].
> Also PHP's memory management is *B*A*D*, so please don't try to create
> long running processes in PHP.

Wasn't designed for such a thing anyway !-)

> But if you have intensive processing to do your web front end should
> signal a backend to do the 'real' work;  keeping your front end thin and
> svelt.  There are numerous ways to accomplish that.


For which definition of "intensive processing" ? Building a web page 
with Drupal when you have a dozen modules hooked here and there can 
already imply some processing...