Erik Johnston 119cb9bbcf Reduce cache size by not storing deferreds ... Currently the cache descriptors store deferreds rather than raw values, this is a simple way of triggering only one database hit and sharing the result if two callers attempt to get the same value. However, there are a few caches that simply store a mapping from string to string (or int). These caches can have a large number of entries, under the assumption that each entry is small. However, the size of a deferred (specifically the size of ObservableDeferred) is signigicantly larger than that of the raw value, 2kb vs 32b. This PR therefore changes the cache descriptors to store the raw values rather than the deferreds. As a side effect cached storage function now either return a deferred or the actual value, as the cached list decriptor already does. This is fine as we always end up just yield'ing on the returned value eventually, which handles that case correctly.		2017-04-25 10:23:11 +01:00
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__init__.py	Only intern ascii strings	2017-04-24 14:07:48 +01:00
descriptors.py	Reduce cache size by not storing deferreds	2017-04-25 10:23:11 +01:00
dictionary_cache.py	Speed up cache size calculation	2017-01-17 11:18:13 +00:00
expiringcache.py	Add setdefault key to ExpiringCache	2017-03-10 10:30:49 +00:00
lrucache.py	Update LruCache size estimate on clear	2017-01-18 14:55:23 +00:00
response_cache.py	Cache federation state responses	2016-07-21 10:30:12 +01:00
snapshot_cache.py	Fix up logcontexts	2016-02-08 14:26:45 +00:00
stream_change_cache.py	Fix assertion to stop transaction queue getting wedged	2017-03-15 12:16:55 +00:00
treecache.py	Rename and comment tree_to_leaves_iterator	2017-01-17 11:47:03 +00:00