From c96b8aaf2d5034f59a7b4da06b15cedf088feb74 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Tue, 28 Oct 2025 21:41:37 -0500
Subject: [PATCH] tweak

---
 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 cc238c9c8e..802fbb8607 100644
--- a/esphome/components/api/proto.h
+++ b/esphome/components/api/proto.h
@@ -220,7 +220,8 @@ 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) {
+  // Use aggressive optimization for this hot path even in -Os builds
+  __attribute__((optimize("O3"))) void encode_varint(uint64_t value) {
     auto buffer = this->buffer_;
     size_t start = buffer->size();