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Send message dicts to memcached as JSON dumps.

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memcached stores objects sent to it using pickling, which is very
slow.  We work around this by sending memcached strings (i.e. JSON
dumps); pickling doesn't slow things down too much if all it is
getting is a string.

(imported from commit 0f0e534182eccb76c5731198e05a9324a1cef316)
This commit is contained in:
Tim Abbott
2013-06-18 14:02:45 -04:00
parent 222ef672b5
commit 631a9048f7
3 changed files with 24 additions and 10 deletions
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8
zephyr/lib/actions.py
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@@ -8,7 +8,7 @@ from zephyr.models import Realm, Stream, UserProfile, UserActivity, \
DefaultStream, UserPresence, MAX_SUBJECT_LENGTH, \
MAX_MESSAGE_LENGTH, get_client, get_stream, get_recipient, get_huddle, \
get_user_profile_by_id, PreregistrationUser, get_display_recipient, \
to_dict_cache_key, get_realm
to_dict_cache_key, get_realm, stringify_message_dict
from django.db import transaction, IntegrityError
from django.db.models import F, Q
from django.core.exceptions import ValidationError
@@ -1010,10 +1010,10 @@ def do_update_message(user_profile, message_id, subject, content):
cache_save_message(message)
items_for_memcached = {}
items_for_memcached[to_dict_cache_key(message, True)] = \
(message.to_dict_uncached(apply_markdown=True,
rendered_content=message.rendered_content),)
(stringify_message_dict(message.to_dict_uncached(apply_markdown=True,
rendered_content=message.rendered_content)),)
items_for_memcached[to_dict_cache_key(message, False)] = \
(message.to_dict_uncached(apply_markdown=False),)
(stringify_message_dict(message.to_dict_uncached(apply_markdown=False)),)
cache_set_many(items_for_memcached)
recipients = [um.user_profile_id for um in UserMessage.objects.filter(message=message_id)]