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authorErik Johnston <erik@matrix.org>2017-06-09 16:25:42 +0100
committerErik Johnston <erik@matrix.org>2017-06-09 16:25:42 +0100
commitb0d975e21619b6eb1dbcf24a5ed68629298bfdce (patch)
tree8d75c1a8843386c9681694ef17da67c1f7e8dfca /synapse/storage
parentCache state deltas (diff)
downloadsynapse-b0d975e21619b6eb1dbcf24a5ed68629298bfdce.tar.xz
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-rw-r--r--synapse/storage/state.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/storage/state.py b/synapse/storage/state.py
index 0bea7374f7..24503cd5aa 100644
--- a/synapse/storage/state.py
+++ b/synapse/storage/state.py
@@ -31,6 +31,9 @@ MAX_STATE_DELTA_HOPS = 100
 
 
 class _GetStateGroupDelta(namedtuple("_GetStateGroupDelta", ("prev_group", "delta_ids"))):
+    """Return type of get_state_group_delta that implements __len__, which lets
+    us use the itrable flag when caching
+    """
     __slots__ = []
 
     def __len__(self):