From b4b2fd2ecee26214fa6b322bcb62bec1ea324c1a Mon Sep 17 00:00:00 2001
From: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
Date: Tue, 1 Jun 2021 12:04:47 +0100
Subject: add a cache to have_seen_event (#9953)

Empirically, this helped my server considerably when handling gaps in Matrix HQ. The problem was that we would repeatedly call have_seen_events for the same set of (50K or so) auth_events, each of which would take many minutes to complete, even though it's only an index scan.
---
 changelog.d/9973.feature | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 changelog.d/9973.feature

(limited to 'changelog.d/9973.feature')

diff --git a/changelog.d/9973.feature b/changelog.d/9973.feature
new file mode 100644
index 0000000000..6b3d1adc70
--- /dev/null
+++ b/changelog.d/9973.feature
@@ -0,0 +1 @@
+Improve performance of incoming federation transactions in large rooms.
-- 
cgit 1.4.1