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Tag "optimization"

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Spaceless all HTML pages

This middleware remove all space between tags and line break of all HTML pages. Use a standard Django method. Set *force_spaceless* for dev. purpose.

  • middleware
  • optimization
  • spaceless
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Django Admin Speedup for big tables on postgres

The code is Django 1.4 version of code based on the [Django 1.3 snippet](http://djangosnippets.org/snippets/2593/) that speeds up Django's admin pages with postgres back-end for big tables (> few hundred thousands of records).

  • postgres
  • speed
  • optimization
  • django-admin
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Fuzzy testing with assertNumQueries

Django 1.3 has an assertNumQueries method which will allows you to simply specify the number of queries you expect. Sometimes, however, specifying the exact number of queries is overkill, and makes the test too brittle. This code provides a way to make more forgiving tests. See http://lukeplant.me.uk/blog/posts/fuzzy-testing-with-assertnumqueries/

  • testing
  • performance
  • optimization
  • assertNumQueries
  • fuzzy
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get_cache_or_query - Shortcut to common cache signature

Replaces something like this: cache_key = 'game1' the_game = cache.get(cache_key) if not the_game: the_game = Game.objects.get(id=1) cache.set(cache_key, the_game, 60*24*5) With this: the_game = get_cache_or_query('game1', Game, seconds_to_cache=60*24*5, id=1)

  • cache
  • optimization
  • get_cache_or_object
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caching parsed templates

Put this code somewhere in one of your INSTALLED_APPS `__init__.py` file. This code will replace the django.template.loader.get_template with cached version. Standard get_template function from django reads and parses the template code every time it's called. This version calls (if DEBUG set to False) it only once per template. After that it gets a Template object from template_cache dictionary. On django http server with template code like that: {% extends "index.html" %} {% block content %} {% if form.has_errors %} <p>Your username and password didn't match. Please try again.</p> {% endif %} <form method="post" action="."> <table> <tr><td><label for="id_username">Username:</label></td><td>{{ form.username }}</td></tr> <tr><td><label for="id_password">Password:</label></td><td>{{ form.password }}</td></tr> </table> <input type="submit" value="login" /> <input type="hidden" name="next" value="{{ next }}" /> </form> {% endblock %} ab -n 100 on mac os x 10.5 core 2 duo 2 ghz with 2 GB of RAM gives forge-macbook:~ forge$ ab -n 100 http://127.0.0.1:8000/login/ This is ApacheBench, Version 2.0.40-dev <$Revision: 1.146 $> apache-2.0 Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Copyright 2006 The Apache Software Foundation, http://www.apache.org/ Benchmarking 127.0.0.1 (be patient).....done Server Software: WSGIServer/0.1 Server Hostname: 127.0.0.1 Server Port: 8000 Document Path: /login/ Document Length: 934 bytes Concurrency Level: 1 Time taken for tests: 0.432934 seconds Complete requests: 100 Failed requests: 0 Write errors: 0 Total transferred: 120200 bytes HTML transferred: 93400 bytes Requests per second: 230.98 [#/sec] (mean) Time per request: 4.329 [ms] (mean) Time per request: 4.329 [ms] (mean, across all concurrent requests) Transfer rate: 270.25 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 0 0.0 0 0 Processing: 3 3 1.5 4 12 Waiting: 3 3 1.2 3 12 Total: 3 3 1.5 4 12 Percentage of the requests served within a certain time (ms) 50% 4 66% 4 75% 4 80% 4 90% 4 95% 5 98% 10 99% 12 100% 12 (longest request) without template caching, and forge-macbook:~ forge$ ab -n 100 http://127.0.0.1:8000/login/ This is ApacheBench, Version 2.0.40-dev <$Revision: 1.146 $> apache-2.0 Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Copyright 2006 The Apache Software Foundation, http://www.apache.org/ Benchmarking 127.0.0.1 (be patient).....done Server Software: WSGIServer/0.1 Server Hostname: 127.0.0.1 Server Port: 8000 Document Path: /login/ Document Length: 934 bytes Concurrency Level: 1 Time taken for tests: 0.369860 seconds Complete requests: 100 Failed requests: 0 Write errors: 0 Total transferred: 120200 bytes HTML transferred: 93400 bytes Requests per second: 270.37 [#/sec] (mean) Time per request: 3.699 [ms] (mean) Time per request: 3.699 [ms] (mean, across all concurrent requests) Transfer rate: 316.34 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 0 0.0 0 0 Processing: 3 3 0.9 3 9 Waiting: 2 3 0.9 3 8 Total: 3 3 0.9 3 9 Percentage of the requests served within a certain time (ms) 50% 3 66% 3 75% 3 80% 3 90% 3 95% 5 98% 8 99% 9 100% 9 (longest request) with caching enabled. In both cases DEBUG is set to False.

  • template
  • cache
  • performance
  • optimization
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5 snippets posted so far.