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Don't create so many state snapshots when updating forward extremities (#1718)

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* Light-weight checking of state changes when updating forward extremities

* Only do this for non-state events, since state events will always result in state change at extremities
This commit is contained in:
Neil Alexander 2021-01-18 13:21:33 +00:00 • committed by GitHub
parent dd1e31bee7
commit 244ff0dccb
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2 changed files with 38 additions and 6 deletions
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4
roomserver/state/state.go
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@ -116,7 +116,7 @@ func (v StateResolution) LoadCombinedStateAfterEvents(
// Deduplicate the IDs before passing them to the database.
// There could be duplicates because the events could be state events where
// the snapshot of the room state before them was the same.
stateBlockNIDLists, err := v.db.StateBlockNIDs(ctx, uniqueStateSnapshotNIDs(stateNIDs))
stateBlockNIDLists, err := v.db.StateBlockNIDs(ctx, UniqueStateSnapshotNIDs(stateNIDs))
if err != nil {
return nil, fmt.Errorf("v.db.StateBlockNIDs: %w", err)
}
@ -1103,7 +1103,7 @@ func (s stateNIDSorter) Len() int { return len(s) }
func (s stateNIDSorter) Less(i, j int) bool { return s[i] < s[j] }
func (s stateNIDSorter) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
func uniqueStateSnapshotNIDs(nids []types.StateSnapshotNID) []types.StateSnapshotNID {
func UniqueStateSnapshotNIDs(nids []types.StateSnapshotNID) []types.StateSnapshotNID {
return nids[:util.SortAndUnique(stateNIDSorter(nids))]
}