commit df20a9138fb9e240b36dc3b740bb431bcd03f3f3
author Protobuf Team Bot <protobuf-github-bot@google.com> Thu Sep 25 16:55:31 2025 -0700
committer Copybara-Service <copybara-worker@google.com> Thu Sep 25 16:58:50 2025 -0700
tree 0480407c214987691f28f529c5355c253afdfde0
parent 2e6ba3159ef301a135114913e976a97f961cd953

Add debugging counters to `GetClassData()`

This change is aimed to help the ongoing optimization efforts around the use of `ClassData`.

PiperOrigin-RevId: 811554065

src/google/protobuf/message_lite.h

diff --git a/src/google/protobuf/message_lite.h b/src/google/protobuf/message_lite.h
index 8bec7c6..a568dd6 100644
--- a/src/google/protobuf/message_lite.h
+++ b/src/google/protobuf/message_lite.h
@@ -1219,8 +1219,10 @@
 PROTOBUF_NDEBUG_INLINE const ClassData* GetClassData(const T& msg) {
   static_assert(std::is_base_of_v<MessageLite, T>);
   if constexpr (std::is_same_v<T, MessageLite> || std::is_same_v<Message, T>) {
+    PROTOBUF_DEBUG_COUNTER("GetClassData.Virtual").Inc();
     return msg.GetClassData();
   } else {
+    PROTOBUF_DEBUG_COUNTER("GetClassData.Constexpr").Inc();
     return MessageTraits<T>::class_data();
   }
 }