From 9b77eb7bb7d899785aa91345ae704cf2f9e1efff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timo=20K=C3=B6sters?= <timo@koesters.xyz>
Date: Sat, 22 May 2021 11:31:15 +0200
Subject: [PATCH] fix: too many syncs

---
 src/client_server/sync.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/client_server/sync.rs b/src/client_server/sync.rs
index 2b6b39ef..b0a22ddf 100644
--- a/src/client_server/sync.rs
+++ b/src/client_server/sync.rs
@@ -103,6 +103,11 @@ pub async fn sync_events_route(
         // The inner Option is None when there is an event, but there is no state hash associated
         // with it. This can happen for the RoomCreate event, so all updates should arrive.
         let first_pdu_before_since = db.rooms.pdus_until(sender_user, &room_id, since).next();
+        let pdus_after_since = db
+            .rooms
+            .pdus_after(sender_user, &room_id, since)
+            .next()
+            .is_some();
 
         let since_shortstatehash = first_pdu_before_since.as_ref().map(|pdu| {
             db.rooms
@@ -116,7 +121,7 @@ pub async fn sync_events_route(
             invited_member_count,
             joined_since_last_sync,
             state_events,
-        ) = if Some(current_shortstatehash) != since_shortstatehash {
+        ) = if pdus_after_since && Some(current_shortstatehash) != since_shortstatehash {
             let current_state = db.rooms.room_state_full(&room_id)?;
             let current_members = current_state
                 .iter()