From 4d6cb8814e134eba644afeed7bd49df0c7951342 Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Tue, 4 Aug 2015 09:32:23 +0100 Subject: Speed up event filtering (for ACL) logic --- synapse/storage/_base.py | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'synapse/storage/_base.py') diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py index 8f812f0fd7..7b76ee3b73 100644 --- a/synapse/storage/_base.py +++ b/synapse/storage/_base.py @@ -71,6 +71,11 @@ class Cache(object): self.thread = None caches_by_name[name] = self.cache + class Sentinel(object): + __slots__ = [] + + self.sentinel = Sentinel() + def check_thread(self): expected_thread = self.thread if expected_thread is None: @@ -85,9 +90,10 @@ class Cache(object): if len(keyargs) != self.keylen: raise ValueError("Expected a key to have %d items", self.keylen) - if keyargs in self.cache: + val = self.cache.get(keyargs, self.sentinel) + if val is not self.sentinel: cache_counter.inc_hits(self.name) - return self.cache[keyargs] + return val cache_counter.inc_misses(self.name) raise KeyError() -- cgit 1.4.1