From 72d2143ea8fe43464b1db59936acef53293b1b2a Mon Sep 17 00:00:00 2001 From: Amber Brown Date: Thu, 28 Jun 2018 11:04:18 +0100 Subject: [PATCH] Revert "Revert "Try to not use as much CPU in the StreamChangeCache"" (#3454) --- changelog.d/3447.misc | 0 synapse/util/caches/stream_change_cache.py | 6 ++++-- 2 files changed, 4 insertions(+), 2 deletions(-) create mode 100644 changelog.d/3447.misc diff --git a/changelog.d/3447.misc b/changelog.d/3447.misc new file mode 100644 index 000000000..e69de29bb diff --git a/synapse/util/caches/stream_change_cache.py b/synapse/util/caches/stream_change_cache.py index 817118e30..0fb862000 100644 --- a/synapse/util/caches/stream_change_cache.py +++ b/synapse/util/caches/stream_change_cache.py @@ -78,7 +78,8 @@ class StreamChangeCache(object): not_known_entities = set(entities) - set(self._entity_to_key) result = ( - set(self._cache.values()[self._cache.bisect_right(stream_pos) :]) + {self._cache[k] for k in self._cache.islice( + start=self._cache.bisect_right(stream_pos))} .intersection(entities) .union(not_known_entities) ) @@ -113,7 +114,8 @@ class StreamChangeCache(object): assert type(stream_pos) is int if stream_pos >= self._earliest_known_stream_pos: - return self._cache.values()[self._cache.bisect_right(stream_pos) :] + return [self._cache[k] for k in self._cache.islice( + start=self._cache.bisect_right(stream_pos))] else: return None