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Reduce allocations in /sync presence stream (#2326)

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* Reduce allocations on presence

* Try to reduce allocations further

* Tweak `IsSharedUser` some more

* Take map lock
This commit is contained in:
Neil Alexander 2022-04-06 13:31:44 +01:00 • committed by GitHub
parent e5e3350ce1
commit 602818460d
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 19 additions and 14 deletions
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15
syncapi/streams/stream_presence.go
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@ -64,18 +64,6 @@ func (p *PresenceStreamProvider) IncrementalSync(
return to
}
// get all joined users
// TODO: SharedUsers might get out of sync
sharedUsers := p.notifier.SharedUsers(req.Device.UserID)
sharedUsersMap := map[string]bool{
req.Device.UserID: true,
}
// convert array to a map for easier checking if a user exists
for i := range sharedUsers {
sharedUsersMap[sharedUsers[i]] = true
}
// add newly joined rooms user presences
newlyJoined := joinedRooms(req.Response, req.Device.UserID)
if len(newlyJoined) > 0 {
@ -88,7 +76,6 @@ func (p *PresenceStreamProvider) IncrementalSync(
for _, roomID := range newlyJoined {
roomUsers := p.notifier.JoinedUsers(roomID)
for i := range roomUsers {
sharedUsersMap[roomUsers[i]] = true
// we already got a presence from this user
if _, ok := presences[roomUsers[i]]; ok {
continue
@ -109,7 +96,7 @@ func (p *PresenceStreamProvider) IncrementalSync(
for i := range presences {
presence := presences[i]
// Ignore users we don't share a room with
if !sharedUsersMap[presence.UserID] {
if req.Device.UserID != presence.UserID && !p.notifier.IsSharedUser(req.Device.UserID, presence.UserID) {
continue
}
cacheKey := req.Device.UserID + req.Device.ID + presence.UserID