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Diffstat (limited to 'synapse/storage')
| -rw-r--r-- | synapse/storage/state.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/synapse/storage/state.py b/synapse/storage/state.py index a3fc859b06..57e334cc3e 100644 --- a/synapse/storage/state.py +++ b/synapse/storage/state.py @@ -412,6 +412,10 @@ class StateStore(SQLBaseStore): for group, state_ids in group_state_dict.items(): if types: + # We delibrately put key -> None mappings into the cache to + # cache absence of the key, on the assumption that if we've + # explicitly asked for some types then we will probably ask + # for them again. state_dict = { key: None for key in types |