From 024097b6353a5a459f5d84f67c6fc1a4278ca892 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Sun, 11 Jan 2026 16:05:33 -1000
Subject: [PATCH] cleanup

---
 esphome/components/api/homeassistant_service.h | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/esphome/components/api/homeassistant_service.h b/esphome/components/api/homeassistant_service.h
index dd7654b8bc..9b4f17766d 100644
--- a/esphome/components/api/homeassistant_service.h
+++ b/esphome/components/api/homeassistant_service.h
@@ -217,7 +217,15 @@ template<typename... Ts> class HomeAssistantServiceCallAction : public Action<Ts
   static void populate_service_map(VectorType &dest, SourceType &source, FixedVector<std::string> &value_storage,
                                    Ts... x) {
     dest.init(source.size());
-    value_storage.init(source.size());  // Max possible, single allocation
+
+    // Count non-static strings to allocate exact storage needed
+    size_t lambda_count = 0;
+    for (const auto &it : source) {
+      if (!it.value.is_static_string()) {
+        lambda_count++;
+      }
+    }
+    value_storage.init(lambda_count);
 
     for (auto &it : source) {
       auto &kv = dest.emplace_back();