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Diffstat (limited to '')
| -rw-r--r-- | synapse/util/caches/descriptors.py | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py index 3c6838df16..998de70d29 100644 --- a/synapse/util/caches/descriptors.py +++ b/synapse/util/caches/descriptors.py @@ -479,7 +479,10 @@ class CacheListDescriptor(object): class _CacheContext(namedtuple("_CacheContext", ("cache", "key"))): # We rely on _CacheContext implementing __eq__ and __hash__ sensibly, - # which namedtuple does for us. + # which namedtuple does for us (i.e. two _CacheContext are the same if + # their caches and keys match). This is important in particular to + # dedupe when we add callbacks to lru cache nodes, otherwise the number + # of callbacks would grow. def invalidate(self): self.cache.invalidate(self.key) |