Django project is very slow
Question: I have a problem with my Django project. Currently I'm using Django 1.6,
Python 3.3.3 sorl-thumbnail 12.0 and everything is really slow. I've spent the
last 3 days in attempts to change it, but everything that I've tried, has had
a very minor effect. Below are the numbers from the django-debug-toolbar:

    
    
    User CPU time - 1976.123 msec
    System CPU time - 176.011 msec
    Total CPU time - 2152.134 msec
    Elapsed time - 3671.669 msec
    
    SQL - 25.95 ms (62 queries)
    CACHE - 76 in 7.409811019897461 ms
    Haystack query - 0.031ms
    

And the time, needed for the code in the view to be executed is
0.04816937446594238. The result was calculated in the following way:

    
    
    import time
    ...
    def base(request):
        start_time = time.time()
        #do something
        end_time = time.time()
        print(end_time - start_time)
        return render(request, 'service/service.html', { 'services': services })
    

Can you please give me some advice on this? The db, static files, media files
and elasticsearch are installed on my local machine. The DEBUG flag is True.

Edit 1: According to Tommaso answer, I have measured the time, needed for
template rendering, and the result was awful - 3407.9 ms (using
template_timings_panel for django_debug_toolbar). Also when I make a test with
ab, on the same page, the time is not very different compared to the number
above. Is it normal? What I can do to optimize it?


Answer:   1. on production server, static fils would be served by nginx (or similar).
  2. thumbnails via SORL would be also updated once per image/size, then nginx serving
  3. you gonna have cached views/calculations via memcache
  4. your code would be compiled only once per session start, other calls would be much faster.

