diff --git a/synapse/storage/databases/main/event_federation.py b/synapse/storage/databases/main/event_federation.py
index 29fb5b7b66..afffa54985 100644
--- a/synapse/storage/databases/main/event_federation.py
+++ b/synapse/storage/databases/main/event_federation.py
@@ -54,7 +54,6 @@ from synapse.util.caches.descriptors import cached
from synapse.util.caches.lrucache import LruCache
from synapse.util.cancellation import cancellable
from synapse.util.iterutils import batch_iter
-from synapse.util.metrics import Measure
if TYPE_CHECKING:
from synapse.server import HomeServer
@@ -414,22 +413,12 @@ class EventFederationWorkerStore(SignatureWorkerStore, EventsWorkerStore, SQLBas
room = await self.get_room(room_id) # type: ignore[attr-defined]
if room["has_auth_chain_index"]:
try:
- with Measure(self.hs.get_clock(), "rei:get_auth_chain_difference_chains") as m:
- r = await self.db_pool.runInteraction(
- "get_auth_chain_difference_chains",
- self._get_auth_chain_difference_using_cover_index_txn,
- room_id,
- state_sets,
- )
- if m.get_resource_usage().ru_utime > 4.0:
- logger.info(
- "REI-ACDC %.2f, ri=%r ss=%r",
- m.get_resource_usage().ru_utime,
- room_id,
- state_sets
- )
- return r
-
+ return await self.db_pool.runInteraction(
+ "get_auth_chain_difference_chains",
+ self._get_auth_chain_difference_using_cover_index_txn,
+ room_id,
+ state_sets,
+ )
except _NoChainCoverIndex:
# For whatever reason we don't actually have a chain cover index
# for the events in question, so we fall back to the old method.
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