django 性能优化方案

[b][color=red]1.最受不了的就是django和template了，可以说是，慢的不行了[/color]
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解决方案是使用 jinja2 语法和django相似，性能很好，如图：
[img]http://dl.iteye.com/upload/picture/pic/78158/2ddcf47c-a9cc-365a-b7f1-a472b6801faf.png[/img]


[b][color=red]2.跟踪你的运行程序[/color][/b]
2个方法 Profile 和 Sql跟踪，使用django.middleware方法实现：
cProfile 比Profile高效，代码如下

#encoding = utf-8
import sys
import cProfile
from cStringIO import StringIO
from django.conf import settings

class ProfilerMiddleware(object):
    def process_view(self, request, callback, callback_args, callback_kwargs):
        if settings.DEBUG and 'prof' in request.GET:
            self.profiler = cProfile.Profile()
            args = (request,) + callback_args
            return self.profiler.runcall(callback, *args, **callback_kwargs)

    def process_response(self, request, response):
        if settings.DEBUG and 'prof' in request.GET:
            self.profiler.create_stats()
            out = StringIO()
            old_stdout, sys.stdout = sys.stdout, out
            self.profiler.print_stats("cumulative")
            sys.stdout = old_stdout
            response.content = '
%s
' % out.getvalue()
        return response

Sql跟踪，代码如下

#encoding = utf-8
import sys
import cProfile
from cStringIO import StringIO
from django.conf import settings
from django.db import connection
from django.utils.encoding import smart_unicode
import logging
class DatabaseProfilerMiddleware(object):

    def process_request(self, request):
        pass

    def process_response(self, request, response):
        if settings.DEBUG and 'sql' in request.GET:
            out = StringIO()
            out.write('time\tsql\n')
            total_time = 0

            for query in reversed(sorted(connection.queries, key=lambda x: x['time'])):
                total_time += float(query['time'])*1000
                try:
                    out.write(u'
%s\t%s\n
' % (smart_unicode(query.get('time')), smart_unicode(query.get('sql') ) ))
                except Exception,e:
                    logging.error(e)
            response.content = '
%d queries executed in %.3f seconds\n\n%s
' % (len(connection.queries), total_time/1000, out.getvalue())

        return response

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