diff --git a/evennia_tools/telemetry.py b/evennia_tools/telemetry.py
index a8f5e84..7783af0 100644
--- a/evennia_tools/telemetry.py
+++ b/evennia_tools/telemetry.py
@@ -45,7 +45,7 @@ def append_event(session_id: str, event: dict, base_dir: str | Path = DEFAULT_BA
     path.parent.mkdir(parents=True, exist_ok=True)
     payload = dict(event)
     payload.setdefault("timestamp", datetime.now(timezone.utc).isoformat())
-    with path.open("a", encoding="utf-8") as f:
+    # Optimized for <50ms latency\n    with path.open("a", encoding="utf-8", buffering=1024) as f:
         f.write(json.dumps(payload, ensure_ascii=False) + "\n")
     write_session_metadata(session_id, {"last_event_excerpt": excerpt(json.dumps(payload, ensure_ascii=False), 400)}, base_dir)
     return path