diff --git a/tdactor/td/actor/impl/Event.h b/tdactor/td/actor/impl/Event.h
index 347b9c4cb..70ece9b77 100644
--- a/tdactor/td/actor/impl/Event.h
+++ b/tdactor/td/actor/impl/Event.h
@@ -242,8 +242,27 @@ class Event {
   }
 };
 
-inline StringBuilder &operator<<(StringBuilder &sb, const Event &e) {
-  return sb << tag("Event", static_cast<int32>(e.type));
+inline StringBuilder &operator<<(StringBuilder &string_builder, const Event &e) {
+  string_builder << "Event::";
+  switch (e.type) {
+    case Event::Type::Start:
+      return string_builder << "Start";
+    case Event::Type::Stop:
+      return string_builder << "Stop";
+    case Event::Type::Yield:
+      return string_builder << "Yield";
+    case Event::Type::Hangup:
+      return string_builder << "Hangup";
+    case Event::Type::Timeout:
+      return string_builder << "Timeout";
+    case Event::Type::Raw:
+      return string_builder << "Raw";
+    case Event::Type::Custom:
+      return string_builder << "Custom";
+    case Event::Type::NoType:
+    default:
+      return string_builder << "NoType";
+  }
 }
 
 }  // namespace td
diff --git a/tdactor/td/actor/impl/Scheduler.cpp b/tdactor/td/actor/impl/Scheduler.cpp
index 9eaaedac2..40e86e2ec 100644
--- a/tdactor/td/actor/impl/Scheduler.cpp
+++ b/tdactor/td/actor/impl/Scheduler.cpp
@@ -253,52 +253,37 @@ void Scheduler::clear() {
 void Scheduler::do_event(ActorInfo *actor_info, Event &&event) {
   event_context_ptr_->link_token = event.link_token;
   auto actor = actor_info->get_actor_unsafe();
+  VLOG(actor) << *actor_info << ' ' << event;
   switch (event.type) {
-    case Event::Type::Start: {
-      VLOG(actor) << *actor_info << " Event::Start";
+    case Event::Type::Start:
       actor->start_up();
       break;
-    }
-    case Event::Type::Stop: {
-      VLOG(actor) << *actor_info << " Event::Stop";
+    case Event::Type::Stop:
       actor->tear_down();
       break;
-    }
-    case Event::Type::Yield: {
-      VLOG(actor) << *actor_info << " Event::Yield";
+    case Event::Type::Yield:
       actor->wakeup();
       break;
-    }
-    case Event::Type::Hangup: {
-      auto token = get_link_token(actor);
-      VLOG(actor) << *actor_info << " Event::Hangup " << tag("token", format::as_hex(token));
-      if (token != 0) {
+    case Event::Type::Hangup:
+      if (get_link_token(actor) != 0) {
         actor->hangup_shared();
       } else {
         actor->hangup();
       }
       break;
-    }
-    case Event::Type::Timeout: {
-      VLOG(actor) << *actor_info << " Event::Timeout";
+    case Event::Type::Timeout:
       actor->timeout_expired();
       break;
-    }
-    case Event::Type::Raw: {
-      VLOG(actor) << *actor_info << " Event::Raw";
+    case Event::Type::Raw:
       actor->raw_event(event.data);
       break;
-    }
-    case Event::Type::Custom: {
+    case Event::Type::Custom:
       do_custom_event(actor_info, *event.data.custom_event);
       break;
-    }
-    case Event::Type::NoType: {
-      UNREACHABLE();
-      break;
-    }
+    case Event::Type::NoType:
     default:
       UNREACHABLE();
+      break;
   }
   // can't clear event here. It may be already destroyed during destory_actor
 }
diff --git a/tdactor/td/actor/impl/Scheduler.h b/tdactor/td/actor/impl/Scheduler.h
index e26e479a6..ae947a2ec 100644
--- a/tdactor/td/actor/impl/Scheduler.h
+++ b/tdactor/td/actor/impl/Scheduler.h
@@ -152,7 +152,6 @@ inline void Scheduler::destroy_actor(ActorInfo *actor_info) {
 }
 
 inline void Scheduler::do_custom_event(ActorInfo *actor_info, CustomEvent &event) {
-  VLOG(actor) << *actor_info << " Event::Custom";
   event.run(actor_info->get_actor_unsafe());
 }