This saves something like 15ms on our 1000 message get_old_messages
queries, and will save even more when we start sending JSON dumps into
our memcached system.
We need to install python-ujson on servers and dev instances before
pushing this to prod.
(imported from commit 373690b7c056d00d2299a7588a33f025104bfbca)
It's strictly more functional, and having a single arguments
extraction decorator makes our codebase less confusing.
(imported from commit 2a5618c04b486268a462a24a1481ac030f15eac4)
See PEP 328[1] for details. This feature was introduced in Python 2.5 and
will become mandatory in Python 3.
[1]: http://www.python.org/dev/peps/pep-0328
(imported from commit 7444eeba8a08d5f91b94c7921848f2274979bd76)
Clients can now request to receive only certain kinds of events,
although they always receive restart events.
(imported from commit 1e72981f8fe763829ab2abde1e35f94cad5c34e4)
This version has several limitations that are addressed in later
commits in this series.
(imported from commit 5d452b312d4204935059c4d602af0b9a8be1a009)
Also improve display of times passed -- we now use display short times
in milliseconds for easier reading.
(imported from commit 08e1e7e6acbef48453080864946f7602a3395e7c)
This is preparatory for running the Django response middleware on
our Tornado responses.
(imported from commit 05da8ea9cb663a928b2f98a928f3992aae4f067c)
This will mainly be useful in the event system branch, where we want
to actually send a response from a file other than tornadoviews.py.
(imported from commit b7ae9bb9b062215ab44eb5f0a3a72d6baeee1d07)
Our previous code could in theory end up clearing the caches it had
just filled, if Tornado's cache filling work happened to be faster
than the memcached flush.
(imported from commit 48174aadad398fb7a7c917a1df765c1261b12a55)
It's closer to a presence query than an update, and more importantly
this moves this out of Tornado -- previously Tornado was spending at
least 3ms per recipient on messages sent to the MIT realm fetching all
this data to return back to users. This should save around 100ms per
message sent to a popular stream the MIT realm -- but more
importantly, each such event is 100ms during which Tornado is not
processing other messages.
(imported from commit 134169f0fdcd9f6640fda957edc4a28b07783d8e)
Fixes#792. I'm really curious what (if anything) this change does to
our Tornado load numbers.
(imported from commit daf81d2dea81f36ec4a3eb19993169b58681e717)
If get_updates requests a message ID that is too old, Tornado will
return a 400, and currently the only way to start caring about newer
message IDs is to reload.
(imported from commit 1638d71868475ffd793162afc7a2731cab14bd75)
This should fix the issues we saw where users who hadn't received a
message in the cache would not be able to receive new messages.
(imported from commit 3834dd5bd5a10c7a603194b540d78afd8a966017)
This is a hack to work around the fact that the query here takes far
longer than it should.
(imported from commit e6ee00c0636fe85cd946e4e3f2bbb2bda2da1f26)
The stream message cache query was grabbing an overly broad set of
columns and related models (e.g. the sender's user_profile), so that
Tornado would spend too long doing the query.
(imported from commit 6a692bc0e31957d4b9d9528d348c4b07a09eb15c)
Later, we can fork off a separate process to do that task, but for
now, we can just rely on the fact that unless the server was just
rebooted, the relevant messages will already be in that cache, and
even if it was, getting the needed messages once each is not a
particularly expensive query.
(imported from commit 6d08eba1b41237fd4e1204e181ce8f227573930d)
This allows us to handle the return_messages_immediately part of
get_updates requests without having to talk to the database.
(imported from commit ed0b7742d359efb21a0a4960f4fc25f4337e9ad4)
This code is from a previous protocol where the users array was posted
as a comma-separate list, rather than encoded via json.
(imported from commit 3a2edfcbf250a7eef305b2e98018c1361cc2fffe)
Tim Abbott
Scott Feeney
Luke Faraone
Zev Benjamin
Keegan McAllister
Leo Franchi
Jessica McKellar
Reid Barton