From 0c313dbe6665c66862bbac870127e492afab2e92 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Sat, 28 Mar 2026 10:34:18 -1000
Subject: [PATCH] Optimize add_actions() to find tail once instead of
 re-walking per action

---
 esphome/core/automation.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/esphome/core/automation.h b/esphome/core/automation.h
index 3cb8caa026..72bcc3d707 100644
--- a/esphome/core/automation.h
+++ b/esphome/core/automation.h
@@ -430,8 +430,13 @@ template<typename... Ts> class ActionList {
     }
   }
   void add_actions(const std::initializer_list<Action<Ts...> *> &actions) {
+    // Find tail once, then append all actions in a single pass
+    Action<Ts...> **tail = &this->actions_begin_;
+    while (*tail != nullptr)
+      tail = &(*tail)->next_;
     for (auto *action : actions) {
-      this->add_action(action);
+      *tail = action;
+      tail = &action->next_;
     }
   }
   // Force-inline: part of the Trigger→Automation→ActionList forwarding