From 860ce811dc516112429acb9d0e9be16016aa4a61 Mon Sep 17 00:00:00 2001
From: kaslo <kaslo@kaslo.me>
Date: Sat, 20 Dec 2025 04:31:19 +0000
Subject: [PATCH] fix: remove timestamp rounding in TerseJsonFormatter

The round(record.created, 2) call limits timestamps generated by
TerseJsonFormatter to 10ms precision. This can cause log ordering issues
in log aggregators like Loki when multiple events occur within the same
10ms window.

The rounding was introduced in the original structured logging PR and,
to my knowledge, has no technical benefit.
---
 synapse/logging/_terse_json.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/synapse/logging/_terse_json.py b/synapse/logging/_terse_json.py
index d9ff70b252..5afa4c5fa9 100644
--- a/synapse/logging/_terse_json.py
+++ b/synapse/logging/_terse_json.py
@@ -89,7 +89,7 @@ class TerseJsonFormatter(JsonFormatter):
             "log": record.getMessage(),
             "namespace": record.name,
             "level": record.levelname,
-            "time": round(record.created, 2),
+            "time": record.created,
         }
 
         return self._format(record, event)