From 05630758f25d958bf60fde4df5f80a89e4a9a0ac Mon Sep 17 00:00:00 2001 From: Richard van der Hoff Date: Thu, 29 Mar 2018 22:57:28 +0100 Subject: [PATCH] Use static JSONEncoders using json.dumps with custom options requires us to create a new JSONEncoder on each call. It's more efficient to create one upfront and reuse it. --- synapse/handlers/message.py | 4 ++-- synapse/replication/tcp/commands.py | 8 +++++--- synapse/storage/events.py | 23 ++++++++--------------- synapse/util/frozenutils.py | 19 +++++++++++++++++++ 4 files changed, 34 insertions(+), 20 deletions(-) diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index 5a8ddc253..6de6e13b7 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -27,7 +27,7 @@ from synapse.types import ( from synapse.util.async import run_on_reactor, ReadWriteLock, Limiter from synapse.util.logcontext import preserve_fn, run_in_background from synapse.util.metrics import measure_func -from synapse.util.frozenutils import unfreeze +from synapse.util.frozenutils import frozendict_json_encoder from synapse.util.stringutils import random_string from synapse.visibility import filter_events_for_client from synapse.replication.http.send_event import send_event_to_master @@ -678,7 +678,7 @@ class EventCreationHandler(object): # Ensure that we can round trip before trying to persist in db try: - dump = simplejson.dumps(unfreeze(event.content)) + dump = frozendict_json_encoder.encode(event.content) simplejson.loads(dump) except Exception: logger.exception("Failed to encode content: %r", event.content) diff --git a/synapse/replication/tcp/commands.py b/synapse/replication/tcp/commands.py index 0005ad587..34bcf903a 100644 --- a/synapse/replication/tcp/commands.py +++ b/synapse/replication/tcp/commands.py @@ -24,6 +24,8 @@ import simplejson logger = logging.getLogger(__name__) +_json_encoder = simplejson.JSONEncoder(namedtuple_as_object=False) + class Command(object): """The base command class. @@ -107,7 +109,7 @@ class RdataCommand(Command): return " ".join(( self.stream_name, str(self.token) if self.token is not None else "batch", - simplejson.dumps(self.row, namedtuple_as_object=False), + _json_encoder.dumps(self.row), )) @@ -302,7 +304,7 @@ class InvalidateCacheCommand(Command): def to_line(self): return " ".join(( - self.cache_func, simplejson.dumps(self.keys, namedtuple_as_object=False) + self.cache_func, _json_encoder.encode(self.keys), )) @@ -334,7 +336,7 @@ class UserIpCommand(Command): ) def to_line(self): - return self.user_id + " " + simplejson.dumps(( + return self.user_id + " " + _json_encoder.encode(( self.access_token, self.ip, self.user_agent, self.device_id, self.last_seen, )) diff --git a/synapse/storage/events.py b/synapse/storage/events.py index f3d65f433..ece5e6c41 100644 --- a/synapse/storage/events.py +++ b/synapse/storage/events.py @@ -14,15 +14,19 @@ # See the License for the specific language governing permissions and # limitations under the License. -from synapse.storage.events_worker import EventsWorkerStore +from collections import OrderedDict, deque, namedtuple +from functools import wraps +import logging +import simplejson as json from twisted.internet import defer -from synapse.events import USE_FROZEN_DICTS +from synapse.storage.events_worker import EventsWorkerStore from synapse.util.async import ObservableDeferred +from synapse.util.frozenutils import frozendict_json_encoder from synapse.util.logcontext import ( - PreserveLoggingContext, make_deferred_yieldable + PreserveLoggingContext, make_deferred_yieldable, ) from synapse.util.logutils import log_function from synapse.util.metrics import Measure @@ -30,16 +34,8 @@ from synapse.api.constants import EventTypes from synapse.api.errors import SynapseError from synapse.util.caches.descriptors import cached, cachedInlineCallbacks from synapse.types import get_domain_from_id - -from canonicaljson import encode_canonical_json -from collections import deque, namedtuple, OrderedDict -from functools import wraps - import synapse.metrics -import logging -import simplejson as json - # these are only included to make the type annotations work from synapse.events import EventBase # noqa: F401 from synapse.events.snapshot import EventContext # noqa: F401 @@ -71,10 +67,7 @@ state_delta_reuse_delta_counter = metrics.register_counter( def encode_json(json_object): - if USE_FROZEN_DICTS: - return encode_canonical_json(json_object) - else: - return json.dumps(json_object, ensure_ascii=False) + return frozendict_json_encoder.encode(json_object) class _EventPeristenceQueue(object): diff --git a/synapse/util/frozenutils.py b/synapse/util/frozenutils.py index 6322f0f55..f497b51f4 100644 --- a/synapse/util/frozenutils.py +++ b/synapse/util/frozenutils.py @@ -14,6 +14,7 @@ # limitations under the License. from frozendict import frozendict +import simplejson as json def freeze(o): @@ -49,3 +50,21 @@ def unfreeze(o): pass return o + + +def _handle_frozendict(obj): + """Helper for EventEncoder. Makes frozendicts serializable by returning + the underlying dict + """ + if type(obj) is frozendict: + # fishing the protected dict out of the object is a bit nasty, + # but we don't really want the overhead of copying the dict. + return obj._dict + raise TypeError('Object of type %s is not JSON serializable' % + obj.__class__.__name__) + + +# A JSONEncoder which is capable of encoding frozendics without barfing +frozendict_json_encoder = json.JSONEncoder( + default=_handle_frozendict, +)