From ed4c2cc8be0c233f37e1ba3ca3f953e07fc2b720 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Tue, 28 Oct 2025 22:13:07 -0500
Subject: [PATCH] [api] Optimize protobuf varint encoding for flash savings

---
 esphome/components/api/proto.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/esphome/components/api/proto.h b/esphome/components/api/proto.h
index f68ef330f6..045e424abf 100644
--- a/esphome/components/api/proto.h
+++ b/esphome/components/api/proto.h
@@ -221,7 +221,8 @@ class ProtoWriteBuffer {
   void write(uint8_t value) { this->buffer_->push_back(value); }
 
   // Single implementation that all overloads delegate to
-  void encode_varint(uint64_t value) {
+  // Mark noinline to prevent code bloat from inlining into every caller
+  __attribute__((noinline)) void encode_varint(uint64_t value) {
     auto buffer = this->buffer_;
     size_t start = buffer->size();