You can create a custom middleware to log this. Here is how I create a middleware to achieve this purpose base on http://djangosnippets.org/snippets/358/ (I modified the code a bit).
Firstly, assuming your project has a name: test_project, create a file name middlewares.py, I place it in the same folder as settings.py:
from django.db import connection
from time import time
from operator import add
import re
class StatsMiddleware(object):
def process_view(self, request, view_func, view_args, view_kwargs):
'''
In your base template, put this:
<div id="stats">
<!-- STATS: Total: %(total_time).2fs Python: %(python_time).2fs DB: %(db_time).2fs Queries: %(db_queries)d ENDSTATS -->
</div>
'''
# Uncomment the following if you want to get stats on DEBUG=True only
#if not settings.DEBUG:
# return None
# get number of db queries before we do anything
n = len(connection.queries)
# time the view
start = time()
response = view_func(request, *view_args, **view_kwargs)
total_time = time() - start
# compute the db time for the queries just run
db_queries = len(connection.queries) - n
if db_queries:
db_time = reduce(add, [float(q['time'])
for q in connection.queries[n:]])
else:
db_time = 0.0
# and backout python time
python_time = total_time - db_time
stats = {
'total_time': total_time,
'python_time': python_time,
'db_time': db_time,
'db_queries': db_queries,
}
# replace the comment if found
if response and response.content:
s = response.content
regexp = re.compile(r'(?P<cmt><!--s*STATS:(?P<fmt>.*?)ENDSTATSs*-->)')
match = regexp.search(s)
if match:
s = (s[:match.start('cmt')] +
match.group('fmt') % stats +
s[match.end('cmt'):])
response.content = s
return response
Secondly, modify settings.py to add your middleware:
MIDDLEWARE_CLASSES = (
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
# ... your existing middlewares ...
# your custom middleware here
'test_project.middlewares.StatsMiddleware',
)
Note: you have to add the full path to your middleware class like above, the format is:
<project_name>.<middleware_file_name>.<middleware_class_name>
A second note is I added this middleware to the end of the list because I just want to log the template load time alone. If you want to log the load time of templates + all middlewares, please put it in the beginning of MIDDLEWARE_CLASSES list (credits to @Symmitchry).
Back to the main topic, the next step is to modify your base.html or whatever pages you want to log load time, add this:
<div id="stats">
<!-- STATS: Total: %(total_time).2fs Python: %(python_time).2fs DB: %(db_time).2fs Queries: %(db_queries)d ENDSTATS -->
</div>
Note: you can name the <div id="stats"> and use CSS for that div however you want, but DON'T change the comment <!-- STATS: .... -->. If you want to change it, be sure that you test it against the regex pattern in the created middlewares.py.
Voila, enjoy the statistics.
EDIT:
For those who use CBVs (Class Based Views) a lot, you might have encountered the error ContentNotRenderedError with above solution. Have no fear, here is the fix in middlewares.py:
# replace the comment if found
if response:
try:
# detects TemplateResponse which are not yet rendered
if response.is_rendered:
rendered_content = response.content
else:
rendered_content = response.rendered_content
except AttributeError: # django < 1.5
rendered_content = response.content
if rendered_content:
s = rendered_content
regexp = re.compile(
r'(?P<cmt><!--s*STATS:(?P<fmt>.*?)ENDSTATSs*-->)'
)
match = regexp.search(s)
if match:
s = (s[:match.start('cmt')] +
match.group('fmt') % stats +
s[match.end('cmt'):])
response.content = s
return response
I got it working with Django 1.6.x, if you have problem with other version of Django, please ping me in comment section.
