From 7687e7744205dd04767ef88b45bd16b354d8b1a6 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Wed, 25 Feb 2026 11:59:58 -0700
Subject: [PATCH] [web_server] Mark classes as final

Mark WebServer, ListEntitiesIterator, DeferredUpdateEventSource, and
DeferredUpdateEventSourceList as final since none are subclassed.

This enables the compiler to devirtualize calls to the many virtual
overrides from Component, Controller, AsyncWebHandler, and
ComponentIterator.

Also remove the unnecessary virtual destructor from ListEntitiesIterator
since the class is now final and the base class (ComponentIterator) has
no virtual destructor.
---
 esphome/components/web_server/list_entities.cpp | 2 --
 esphome/components/web_server/list_entities.h   | 3 +--
 esphome/components/web_server/web_server.h      | 6 +++---
 3 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/esphome/components/web_server/list_entities.cpp b/esphome/components/web_server/list_entities.cpp
index 84582980620..ebe7bf44504 100644
--- a/esphome/components/web_server/list_entities.cpp
+++ b/esphome/components/web_server/list_entities.cpp
@@ -14,8 +14,6 @@ ListEntitiesIterator::ListEntitiesIterator(const WebServer *ws, AsyncEventSource
 ListEntitiesIterator::ListEntitiesIterator(const WebServer *ws, DeferredUpdateEventSource *es)
     : web_server_(ws), events_(es) {}
 #endif
-ListEntitiesIterator::~ListEntitiesIterator() {}
-
 #ifdef USE_BINARY_SENSOR
 bool ListEntitiesIterator::on_binary_sensor(binary_sensor::BinarySensor *obj) {
   this->events_->deferrable_send_state(obj, "state_detail_all", WebServer::binary_sensor_all_json_generator);
diff --git a/esphome/components/web_server/list_entities.h b/esphome/components/web_server/list_entities.h
index d0a4fa27256..6a840661097 100644
--- a/esphome/components/web_server/list_entities.h
+++ b/esphome/components/web_server/list_entities.h
@@ -17,14 +17,13 @@ class DeferredUpdateEventSource;
 #endif
 class WebServer;
 
-class ListEntitiesIterator : public ComponentIterator {
+class ListEntitiesIterator final : public ComponentIterator {
  public:
 #ifdef USE_ESP32
   ListEntitiesIterator(const WebServer *ws, esphome::web_server_idf::AsyncEventSource *es);
 #elif defined(USE_ARDUINO)
   ListEntitiesIterator(const WebServer *ws, DeferredUpdateEventSource *es);
 #endif
-  virtual ~ListEntitiesIterator();
 #ifdef USE_BINARY_SENSOR
   bool on_binary_sensor(binary_sensor::BinarySensor *obj) override;
 #endif
diff --git a/esphome/components/web_server/web_server.h b/esphome/components/web_server/web_server.h
index 76c1c8b0bd5..64c492f82b7 100644
--- a/esphome/components/web_server/web_server.h
+++ b/esphome/components/web_server/web_server.h
@@ -107,7 +107,7 @@ enum JsonDetail { DETAIL_ALL, DETAIL_STATE };
 using message_generator_t = json::SerializationBuffer<>(WebServer *, void *);
 
 class DeferredUpdateEventSourceList;
-class DeferredUpdateEventSource : public AsyncEventSource {
+class DeferredUpdateEventSource final : public AsyncEventSource {
   friend class DeferredUpdateEventSourceList;
 
   /*
@@ -163,7 +163,7 @@ class DeferredUpdateEventSource : public AsyncEventSource {
   void try_send_nodefer(const char *message, const char *event = nullptr, uint32_t id = 0, uint32_t reconnect = 0);
 };
 
-class DeferredUpdateEventSourceList : public std::list<DeferredUpdateEventSource *> {
+class DeferredUpdateEventSourceList final : public std::list<DeferredUpdateEventSource *> {
  protected:
   void on_client_connect_(DeferredUpdateEventSource *source);
   void on_client_disconnect_(DeferredUpdateEventSource *source);
@@ -187,7 +187,7 @@ class DeferredUpdateEventSourceList : public std::list<DeferredUpdateEventSource
  * under the '/light/...', '/sensor/...', ... URLs. A full documentation for this API
  * can be found under https://esphome.io/web-api/.
  */
-class WebServer : public Controller, public Component, public AsyncWebHandler {
+class WebServer final : public Controller, public Component, public AsyncWebHandler {
 #if !defined(USE_ESP32) && defined(USE_ARDUINO)
   friend class DeferredUpdateEventSourceList;
 #endif