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POPerformance issues with Django
 

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  1. POPerformance issues with Django
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    <p>I'm trying to track down some performance issues I have had with Django. There seems to be a 600-800 ms delay from the time I click refresh to the time the browser gets a response. </p> <p>I set up a simple view and the profile middleware and this is the view and results:</p> <p>the view function:</p> <pre><code>def test(request): return HttpResponse("It works") </code></pre> <p>The profile results( i used <a href="http://www.djangosnippets.org/snippets/186/" rel="nofollow">http://www.djangosnippets.org/snippets/186/</a>):</p> <pre><code>9 function calls in 0.000 CPU seconds Ordered by: internal time, call count ncalls tottime percall cumtime percall filename:lineno(function) 1 0.000 0.000 0.000 0.000 /usr/local/lib/python2.6/dist-packages/Django-1.3.1-py2.6.egg/django/http/__init__.py:487(__init__) 1 0.000 0.000 0.000 0.000 /home/mysite/mysite/mysite/map/views.py:19(test) 1 0.000 0.000 0.000 0.000 /usr/local/lib/python2.6/dist-packages/Django-1.3.1-py2.6.egg/django/http/__init__.py:532(__setitem__) 3 0.000 0.000 0.000 0.000 /usr/local/lib/python2.6/dist-packages/Django-1.3.1-py2.6.egg/django/http/__init__.py:517(_convert_to_ascii) 2 0.000 0.000 0.000 0.000 /usr/local/lib/python2.6/dist-packages/Django-1.3.1-py2.6.egg/django/utils/functional.py:274(__getattr__) 1 0.000 0.000 0.000 0.000 /usr/lib/python2.6/Cookie.py:573(__init__) 0 0.000 0.000 profile:0(profiler) ---- By file ---- tottime 0.0% 0.000 /usr/local/lib/python2.6/dist-packages/Django-1.3.1-py2.6.egg/django/utils/functional.py 0.0% 0.000 /usr/local/lib/python2.6/dist-packages/Django-1.3.1-py2.6.egg/django/http/__init__.py 0.0% 0.000 /usr/lib/python2.6/Cookie.py 0.0% 0.000 /home/mysite/mysite/mysite/map/views.py ---- By group --- tottime 0.0% 0.000 /usr/local/lib/python2.6/dist-packages/Django-1.3.1-py2.6.egg/django/utils 0.0% 0.000 /usr/local/lib/python2.6/dist-packages/Django-1.3.1-py2.6.egg/django/http 0.0% 0.000 /usr/lib/python2.6 0.0% 0.000 /home/mysite/mysite/mysite/map </code></pre> <p>So with that, the profiler isn't returning any numbers, yet Chrome reports a 647 ms delay from requesting the resource to actually getting any response. My ping time to the server is about 50 ms. Any ideas how I can get better profiling so I can see where in Django is causing this slowdown?</p> <p>My WSGI config. I'm using Cherokee with uwsgi.</p> <pre><code>import os import sys path = '/home/mysite/mysite/mysite/' if path not in sys.path: sys.path.append(path) os.environ['DJANGO_SETTINGS_MODULE'] = 'settings' import django.core.handlers.wsgi application = django.core.handlers.wsgi.WSGIHandler() </code></pre> <p>I see this delay(within 20 ms) on different computers as well as different networks. I'm also seeing it when I just use manage.py runserver.</p>
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    1. COHow many times did you make a request to get these profiling numbers which are all zeroes? "Chrome reports a 647 ms delay". Have you measured how slow your PC is? Most of slowness of a web site is on the desktop -- not the network.
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    2. COWhat webserver are your using? Did you try using actual profiling tools like apache-utils ?
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