From 771404668d04418b377c660398f6ae1812d8bdd5 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sun, 8 Mar 2026 14:01:01 -1000
Subject: [PATCH] [api] Inline fast path of try_to_clear_buffer (#14630)

---
 esphome/components/api/api_connection.cpp |  6 +-----
 esphome/components/api/api_connection.h   | 10 +++++++++-
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/esphome/components/api/api_connection.cpp b/esphome/components/api/api_connection.cpp
index 43f5070a40..28a770a4fb 100644
--- a/esphome/components/api/api_connection.cpp
+++ b/esphome/components/api/api_connection.cpp
@@ -1945,11 +1945,7 @@ void APIConnection::on_noise_encryption_set_key_request(const NoiseEncryptionSet
 #ifdef USE_API_HOMEASSISTANT_STATES
 void APIConnection::on_subscribe_home_assistant_states_request() { state_subs_at_ = 0; }
 #endif
-bool APIConnection::try_to_clear_buffer(bool log_out_of_space) {
-  if (this->flags_.remove)
-    return false;
-  if (this->helper_->can_write_without_blocking())
-    return true;
+bool APIConnection::try_to_clear_buffer_slow_(bool log_out_of_space) {
   delay(0);
   APIError err = this->helper_->loop();
   if (err != APIError::OK) {
diff --git a/esphome/components/api/api_connection.h b/esphome/components/api/api_connection.h
index 5d1469e419..ccb51186d6 100644
--- a/esphome/components/api/api_connection.h
+++ b/esphome/components/api/api_connection.h
@@ -305,7 +305,13 @@ class APIConnection final : public APIServerConnectionBase {
     this->prepare_first_message_buffer(shared_buf, header_padding, payload_size + header_padding + footer_size);
   }
 
-  bool try_to_clear_buffer(bool log_out_of_space);
+  bool try_to_clear_buffer(bool log_out_of_space) {
+    if (this->flags_.remove)
+      return false;
+    if (this->helper_->can_write_without_blocking())
+      return true;
+    return this->try_to_clear_buffer_slow_(log_out_of_space);
+  }
   bool send_buffer(ProtoWriteBuffer buffer, uint8_t message_type) override;
 
   const char *get_name() const { return this->helper_->get_client_name(); }
@@ -315,6 +321,8 @@ class APIConnection final : public APIServerConnectionBase {
   }
 
  protected:
+  bool try_to_clear_buffer_slow_(bool log_out_of_space);
+
   // Helper function to handle authentication completion
   void complete_authentication_();