From 42fe39cfd9bd163ac7e2c26799164d6eef01ae2e Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Fri, 27 Mar 2026 16:24:23 -1000
Subject: [PATCH] Use pointer iteration in call() to avoid uint16_t movzx
 overhead on x86-64

---
 esphome/core/helpers.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/esphome/core/helpers.h b/esphome/core/helpers.h
index 47775dd43c..169028be1a 100644
--- a/esphome/core/helpers.h
+++ b/esphome/core/helpers.h
@@ -1834,8 +1834,9 @@ template<typename... Ts> class CallbackManager<void(Ts...)> {
 
   /// Call all callbacks in this manager.
   void call(Ts... args) {
-    for (uint16_t i = 0; i < this->size_; i++)
-      this->data_[i].call(args...);
+    for (auto *it = this->data_, *end = it + this->size_; it != end; ++it) {
+      it->call(args...);
+    }
   }
   uint16_t size() const { return this->size_; }