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Hit the database far less in Events to find room NIDs and room versions (#1643)

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* Hit the database far less to find room NIDs for event NIDs

* Close the rows

* Fix SQLite selectRoomNIDsForEventNIDsSQL

* Give same treatment to room version lookups
This commit is contained in:
Neil Alexander 2020-12-16 10:33:28 +00:00 • committed by GitHub
parent d2bcc5f746
commit 9057143033
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6 changed files with 138 additions and 65 deletions
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34
roomserver/storage/shared/storage.go
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@ -313,25 +313,29 @@ func (d *Database) Events(
if err != nil {
eventIDs = map[types.EventNID]string{}
}
var roomNIDs map[types.EventNID]types.RoomNID
roomNIDs, err = d.EventsTable.SelectRoomNIDsForEventNIDs(ctx, eventNIDs)
if err != nil {
return nil, err
}
uniqueRoomNIDs := make(map[types.RoomNID]struct{})
for _, n := range roomNIDs {
uniqueRoomNIDs[n] = struct{}{}
}
roomNIDList := make([]types.RoomNID, 0, len(uniqueRoomNIDs))
for n := range uniqueRoomNIDs {
roomNIDList = append(roomNIDList, n)
}
roomVersions, err := d.RoomsTable.SelectRoomVersionsForRoomNIDs(ctx, roomNIDList)
if err != nil {
return nil, err
}
results := make([]types.Event, len(eventJSONs))
for i, eventJSON := range eventJSONs {
var roomNID types.RoomNID
var roomVersion gomatrixserverlib.RoomVersion
result := &results[i]
result.EventNID = eventJSON.EventNID
roomNID, err = d.EventsTable.SelectRoomNIDForEventNID(ctx, eventJSON.EventNID)
if err != nil {
return nil, err
}
if roomID, ok := d.Cache.GetRoomServerRoomID(roomNID); ok {
roomVersion, _ = d.Cache.GetRoomVersion(roomID)
}
if roomVersion == "" {
roomVersion, err = d.RoomsTable.SelectRoomVersionForRoomNID(ctx, roomNID)
if err != nil {
return nil, err
}
}
roomNID := roomNIDs[result.EventNID]
roomVersion := roomVersions[roomNID]
result.Event, err = gomatrixserverlib.NewEventFromTrustedJSONWithEventID(
eventIDs[eventJSON.EventNID], eventJSON.EventJSON, false, roomVersion,
)