diff --git a/esphome/components/web_server_idf/web_server_idf.cpp b/esphome/components/web_server_idf/web_server_idf.cpp
index 734259093e..483fae4f08 100644
--- a/esphome/components/web_server_idf/web_server_idf.cpp
+++ b/esphome/components/web_server_idf/web_server_idf.cpp
@@ -423,14 +423,14 @@ void AsyncEventSourceResponse::destroy(void *ptr) {
 void AsyncEventSourceResponse::deq_push_back_with_dedup_(void *source, message_generator_t *message_generator) {
   DeferredEvent item(source, message_generator);
 
-  auto iter = std::find_if(this->deferred_queue_.begin(), this->deferred_queue_.end(),
-                           [&item](const DeferredEvent &test) -> bool { return test == item; });
-
-  if (iter != this->deferred_queue_.end()) {
-    (*iter) = item;
-  } else {
-    this->deferred_queue_.push_back(item);
+  // Use range-based for loop instead of std::find_if to reduce template instantiation overhead and binary size
+  for (auto &event : this->deferred_queue_) {
+    if (event == item) {
+      event = item;
+      return;
+    }
   }
+  this->deferred_queue_.push_back(item);
 }
 
 void AsyncEventSourceResponse::process_deferred_queue_() {