From 87e998f455bf6cf88fad0257bf42ab8d2124daba Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Mon, 16 Feb 2026 19:05:44 -0600
Subject: [PATCH] [http_request] Replace std::map with std::vector<std::pair>
 in action template

request_headers_ and json_ are populated at config time via
add_request_header()/add_json() and only iterated linearly at
runtime. std::map's red-black tree is unnecessary overhead for
these small collections. Drop the <map> include.
---
 esphome/components/http_request/http_request.h | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/esphome/components/http_request/http_request.h b/esphome/components/http_request/http_request.h
index cbf6273b51..17aeeba7d0 100644
--- a/esphome/components/http_request/http_request.h
+++ b/esphome/components/http_request/http_request.h
@@ -1,7 +1,6 @@
 #pragma once
 
 #include <list>
-#include <map>
 #include <memory>
 #include <set>
 #include <utility>
@@ -401,12 +400,12 @@ template<typename... Ts> class HttpRequestSendAction : public Action<Ts...> {
 #endif
 
   void add_request_header(const char *key, TemplatableValue<const char *, Ts...> value) {
-    this->request_headers_.insert({key, value});
+    this->request_headers_.push_back({key, value});
   }
 
   void add_collect_header(const char *value) { this->collect_headers_.push_back(value); }
 
-  void add_json(const char *key, TemplatableValue<std::string, Ts...> value) { this->json_.insert({key, value}); }
+  void add_json(const char *key, TemplatableValue<std::string, Ts...> value) { this->json_.push_back({key, value}); }
 
   void set_json(std::function<void(Ts..., JsonObject)> json_func) { this->json_func_ = json_func; }
 
@@ -508,9 +507,9 @@ template<typename... Ts> class HttpRequestSendAction : public Action<Ts...> {
   }
   void encode_json_func_(Ts... x, JsonObject root) { this->json_func_(x..., root); }
   HttpRequestComponent *parent_;
-  std::map<const char *, TemplatableValue<const char *, Ts...>> request_headers_{};
+  std::vector<std::pair<const char *, TemplatableValue<const char *, Ts...>>> request_headers_{};
   std::vector<std::string> collect_headers_{"content-type", "content-length"};
-  std::map<const char *, TemplatableValue<std::string, Ts...>> json_{};
+  std::vector<std::pair<const char *, TemplatableValue<std::string, Ts...>>> json_{};
   std::function<void(Ts..., JsonObject)> json_func_{nullptr};
 #ifdef USE_HTTP_REQUEST_RESPONSE
   Trigger<std::shared_ptr<HttpContainer>, std::string &, Ts...> success_trigger_with_response_;