Steve Howell 986dd8289e Optimize get_subscribers back end. ...

get_subscribers_backend() now calls the new get_subscriber_emails()
function, which just queries the email field:

  "zerver_userprofile"."email"

...instead of querying about 40 fields that it never uses.

I was able to verify the query slimming by watching my postgres server log.

Also, you can verify that the ORM does roughly 16x less work using values():

>>> def f(): return [sub.user_profile.email for sub in list(Subscription.objects.all().select_related())]
...
>>> def g(): return [row['user_profile__email'] for row in list(Subscription.objects.all().values('user_profile__email'))]
...
>>> def timeit(func): t = time.time(); func(); return time.time() - t
...
>>> timeit(f)
0.045198917388916016
>>> timeit(g)
0.002752065658569336

(imported from commit a69f690a96d076b323fdfc2f4821b0548bdfac7f)

2013-09-19 08:52:53 -04:00

..

__init__.py

Optimize get_subscribers back end.

2013-09-19 08:52:53 -04:00

webhooks.py

github: Remove the issue title from message bodies

2013-09-17 13:55:39 -04:00