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| author | Richard van der Hoff <richard@matrix.org> | 2018-07-12 11:37:44 +0100 |
|---|---|---|
| committer | Richard van der Hoff <richard@matrix.org> | 2018-07-12 11:37:44 +0100 |
| commit | fa5c2bc082185580e7d65a8759a8b5213933a137 (patch) | |
| tree | d17427df60d28be7fabed6f6ecf0de5dc2a05c5f /CONTRIBUTING.rst | |
| parent | Merge pull request #3505 from matrix-org/erikj/receipts_cahce (diff) | |
| download | synapse-fa5c2bc082185580e7d65a8759a8b5213933a137.tar.xz | |
Reduce set building in get_entities_changed
This line shows up as about 5% of cpu time on a synchrotron:
not_known_entities = set(entities) - set(self._entity_to_key)
Presumably the problem here is that _entity_to_key can be largeish, and
building a set for its keys every time this function is called is slow.
Here we rewrite the logic to avoid building so many sets.
Diffstat (limited to 'CONTRIBUTING.rst')
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