From 59a2f6f5380bfda7b43e118e2cb4ac24779f1142 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Mon, 9 Feb 2026 09:28:51 -0600
Subject: [PATCH] Add comment explaining early guard

---
 esphome/components/ld2412/ld2412.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/esphome/components/ld2412/ld2412.cpp b/esphome/components/ld2412/ld2412.cpp
index a4099c45b1f..1deb0075a6f 100644
--- a/esphome/components/ld2412/ld2412.cpp
+++ b/esphome/components/ld2412/ld2412.cpp
@@ -310,6 +310,8 @@ void LD2412Component::restart_and_read_all_info() {
 }
 
 void LD2412Component::loop() {
+  // Early return avoids stack adjustment for the batch buffer below.
+  // loop() runs ~7000/min so most calls have nothing to read.
   int avail = this->available();
   if (avail <= 0) {
     return;