diff --git a/synapse/api/ratelimiting.py b/synapse/api/ratelimiting.py
index 229329a5ae..8665b3b765 100644
--- a/synapse/api/ratelimiting.py
+++ b/synapse/api/ratelimiting.py
@@ -20,8 +20,7 @@
#
#
-from collections import OrderedDict
-from typing import Hashable, Optional, Tuple
+from typing import Dict, Hashable, Optional, Tuple
from synapse.api.errors import LimitExceededError
from synapse.config.ratelimiting import RatelimitSettings
@@ -80,12 +79,14 @@ class Ratelimiter:
self.store = store
self._limiter_name = cfg.key
- # An ordered dictionary representing the token buckets tracked by this rate
+ # A dictionary representing the token buckets tracked by this rate
# limiter. Each entry maps a key of arbitrary type to a tuple representing:
# * The number of tokens currently in the bucket,
# * The time point when the bucket was last completely empty, and
# * The rate_hz (leak rate) of this particular bucket.
- self.actions: OrderedDict[Hashable, Tuple[float, float, float]] = OrderedDict()
+ self.actions: Dict[Hashable, Tuple[float, float, float]] = {}
+
+ self.clock.looping_call(self._prune_message_counts, 60 * 1000)
def _get_key(
self, requester: Optional[Requester], key: Optional[Hashable]
@@ -169,9 +170,6 @@ class Ratelimiter:
rate_hz = rate_hz if rate_hz is not None else self.rate_hz
burst_count = burst_count if burst_count is not None else self.burst_count
- # Remove any expired entries
- self._prune_message_counts(time_now_s)
-
# Check if there is an existing count entry for this key
action_count, time_start, _ = self._get_action_counts(key, time_now_s)
@@ -246,13 +244,12 @@ class Ratelimiter:
action_count, time_start, rate_hz = self._get_action_counts(key, time_now_s)
self.actions[key] = (action_count + n_actions, time_start, rate_hz)
- def _prune_message_counts(self, time_now_s: float) -> None:
+ def _prune_message_counts(self) -> None:
"""Remove message count entries that have not exceeded their defined
rate_hz limit
-
- Args:
- time_now_s: The current time
"""
+ time_now_s = self.clock.time()
+
# We create a copy of the key list here as the dictionary is modified during
# the loop
for key in list(self.actions.keys()):
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