From 9c712744bea9c495bfc7c62275c4f8c03cf9493a Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Tue, 21 Oct 2025 12:40:19 -1000
Subject: [PATCH 1/2] [light] Replace std::vector with FixedVector in strobe
 and color_wipe effects (#11455)

---
 esphome/components/light/addressable_light_effect.h | 6 +++---
 esphome/components/light/base_light_effects.h       | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/esphome/components/light/addressable_light_effect.h b/esphome/components/light/addressable_light_effect.h
index fcf76b3cb0..9caccad634 100644
--- a/esphome/components/light/addressable_light_effect.h
+++ b/esphome/components/light/addressable_light_effect.h
@@ -1,9 +1,9 @@
 #pragma once
 
 #include <utility>
-#include <vector>
 
 #include "esphome/core/component.h"
+#include "esphome/core/helpers.h"
 #include "esphome/components/light/light_state.h"
 #include "esphome/components/light/addressable_light.h"
 
@@ -113,7 +113,7 @@ struct AddressableColorWipeEffectColor {
 class AddressableColorWipeEffect : public AddressableLightEffect {
  public:
   explicit AddressableColorWipeEffect(const std::string &name) : AddressableLightEffect(name) {}
-  void set_colors(const std::vector<AddressableColorWipeEffectColor> &colors) { this->colors_ = colors; }
+  void set_colors(const std::initializer_list<AddressableColorWipeEffectColor> &colors) { this->colors_ = colors; }
   void set_add_led_interval(uint32_t add_led_interval) { this->add_led_interval_ = add_led_interval; }
   void set_reverse(bool reverse) { this->reverse_ = reverse; }
   void apply(AddressableLight &it, const Color &current_color) override {
@@ -155,7 +155,7 @@ class AddressableColorWipeEffect : public AddressableLightEffect {
   }
 
  protected:
-  std::vector<AddressableColorWipeEffectColor> colors_;
+  FixedVector<AddressableColorWipeEffectColor> colors_;
   size_t at_color_{0};
   uint32_t last_add_{0};
   uint32_t add_led_interval_{};
diff --git a/esphome/components/light/base_light_effects.h b/esphome/components/light/base_light_effects.h
index ff6cd1ccfe..c74d19fe14 100644
--- a/esphome/components/light/base_light_effects.h
+++ b/esphome/components/light/base_light_effects.h
@@ -1,9 +1,9 @@
 #pragma once
 
 #include <utility>
-#include <vector>
 
 #include "esphome/core/automation.h"
+#include "esphome/core/helpers.h"
 #include "light_effect.h"
 
 namespace esphome {
@@ -188,10 +188,10 @@ class StrobeLightEffect : public LightEffect {
     this->last_switch_ = now;
   }
 
-  void set_colors(const std::vector<StrobeLightEffectColor> &colors) { this->colors_ = colors; }
+  void set_colors(const std::initializer_list<StrobeLightEffectColor> &colors) { this->colors_ = colors; }
 
  protected:
-  std::vector<StrobeLightEffectColor> colors_;
+  FixedVector<StrobeLightEffectColor> colors_;
   uint32_t last_switch_{0};
   size_t at_color_{0};
 };

From ece0619070dc03e77776e61970de27bc35740c86 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Tue, 21 Oct 2025 14:05:43 -1000
Subject: [PATCH 2/2] [event] Replace std::set with FixedVector for event type
 storage

---
 esphome/components/event/event.cpp | 13 ++++++++++---
 esphome/components/event/event.h   |  7 +++----
 2 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/esphome/components/event/event.cpp b/esphome/components/event/event.cpp
index d27b3b378e..20549ad0a5 100644
--- a/esphome/components/event/event.cpp
+++ b/esphome/components/event/event.cpp
@@ -8,12 +8,19 @@ namespace event {
 static const char *const TAG = "event";
 
 void Event::trigger(const std::string &event_type) {
-  auto found = types_.find(event_type);
-  if (found == types_.end()) {
+  // Linear search - faster than std::set for small datasets (1-5 items typical)
+  const std::string *found = nullptr;
+  for (const auto &type : this->types_) {
+    if (type == event_type) {
+      found = &type;
+      break;
+    }
+  }
+  if (found == nullptr) {
     ESP_LOGE(TAG, "'%s': invalid event type for trigger(): %s", this->get_name().c_str(), event_type.c_str());
     return;
   }
-  last_event_type = &(*found);
+  last_event_type = found;
   ESP_LOGD(TAG, "'%s' Triggered event '%s'", this->get_name().c_str(), last_event_type->c_str());
   this->event_callback_.call(event_type);
 }
diff --git a/esphome/components/event/event.h b/esphome/components/event/event.h
index a90c8ebe05..2f6267a200 100644
--- a/esphome/components/event/event.h
+++ b/esphome/components/event/event.h
@@ -1,6 +1,5 @@
 #pragma once
 
-#include <set>
 #include <string>
 
 #include "esphome/core/component.h"
@@ -26,13 +25,13 @@ class Event : public EntityBase, public EntityBase_DeviceClass {
   const std::string *last_event_type;
 
   void trigger(const std::string &event_type);
-  void set_event_types(const std::set<std::string> &event_types) { this->types_ = event_types; }
-  std::set<std::string> get_event_types() const { return this->types_; }
+  void set_event_types(const std::initializer_list<std::string> &event_types) { this->types_ = event_types; }
+  const FixedVector<std::string> &get_event_types() const { return this->types_; }
   void add_on_event_callback(std::function<void(const std::string &event_type)> &&callback);
 
  protected:
   CallbackManager<void(const std::string &event_type)> event_callback_;
-  std::set<std::string> types_;
+  FixedVector<std::string> types_;
 };
 
 }  // namespace event