Profiler decorator for Django

decorator.py

import hotshot
import os
import time
from django.conf import settings

try:
    PROFILE_LOG_BASE = settings.PROFILE_LOG_BASE
except:
    PROFILE_LOG_BASE = settings.ROOT

def profile(log_file):
    """Profile some callable.

    This decorator uses the hotshot profiler to profile some callable (like
    a view function or method) and dumps the profile data somewhere sensible
    for later processing and examination.

    It takes one argument, the profile log name. If it's a relative path, it
    places it under the PROFILE_LOG_BASE. It also inserts a time stamp into the 
    file name, such that 'my_view.prof' become 'my_view-20100211T170321.prof', 
    where the time stamp is in UTC. This makes it easy to run and compare 
    multiple trials.

    For more information see: https://code.djangoproject.com/wiki/ProfilingDjango
    """

    if not os.path.isabs(log_file):
        log_file = os.path.join(PROFILE_LOG_BASE, log_file)

    def _outer(f):
        def _inner(*args, **kwargs):
            # Add a timestamp to the profile output when the callable
            # is actually called.
            if settings.DEBUG:
                (base, ext) = os.path.splitext(log_file)
                base = base + "-" + time.strftime("%Y%m%dT%H%M%S", time.gmtime())
                final_log_file = base + ext

                prof = hotshot.Profile(final_log_file)
                try:
                    ret = prof.runcall(f, *args, **kwargs)
                finally:
                    prof.close()
                return ret
            else:
                return f(*args, **kwargs)

        return _inner
    return _outer

profiler.py

#!/usr/bin/python
"""Read a profile file generated by hotshot

Can be used as: ./profile ./<file_name>
"""

import hotshot.stats
import sys

stats = hotshot.stats.load(sys.argv[1])

stats.sort_stats('time', 'calls')
stats.print_stats()