From e2e9c84c886726bea2ff92c15995435602b7d46f Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Tue, 17 Oct 2023 19:35:39 -1000
Subject: [PATCH] Cache construction of battery icon (#102194)

This was being built every time state was written. When
a robo vac is operating it writes state often which mean building
the icon string over and over again when it rarely changes.
---
 homeassistant/helpers/icon.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/homeassistant/helpers/icon.py b/homeassistant/helpers/icon.py
index a289ab4a8749f2..97e0d20927c0e9 100644
--- a/homeassistant/helpers/icon.py
+++ b/homeassistant/helpers/icon.py
@@ -1,7 +1,10 @@
 """Icon helper methods."""
 from __future__ import annotations
 
+from functools import lru_cache
 
+
+@lru_cache
 def icon_for_battery_level(
     battery_level: int | None = None, charging: bool = False
 ) -> str: