diff --git a/framework/android/connector/driver/js/src/main/cpp/src/convert_utils.cc b/framework/android/connector/driver/js/src/main/cpp/src/convert_utils.cc
index 46615e04cf6..4a164ec0a31 100644
--- a/framework/android/connector/driver/js/src/main/cpp/src/convert_utils.cc
+++ b/framework/android/connector/driver/js/src/main/cpp/src/convert_utils.cc
@@ -205,6 +205,7 @@ ConvertUtils::HandleObjectType(const std::shared_ptr<Ctx>& ctx,
     j_env->DeleteLocalRef(method_name_str);
     j_env->DeleteLocalRef(call_id_str);
     auto ref = std::make_shared<JavaRef>(j_env, j_obj);
+    j_env->DeleteLocalRef(j_obj);
     global_refs.push_back(ref);
     j_args.l = ref->GetObj();
     return std::make_tuple(true, "", true);
@@ -219,7 +220,9 @@ ConvertUtils::HandleObjectType(const std::shared_ptr<Ctx>& ctx,
     if (!std::get<0>(to_array_tuple)) {
       return std::make_tuple(false, std::get<1>(to_array_tuple), false);
     }
-    auto ref = std::make_shared<JavaRef>(j_env, std::get<2>(to_array_tuple));
+    auto j_obj = std::get<2>(to_array_tuple);
+    auto ref = std::make_shared<JavaRef>(j_env, j_obj);
+    j_env->DeleteLocalRef(j_obj);
     global_refs.push_back(ref);
     j_args.l = ref->GetObj();
     return std::make_tuple(true, "", true);
@@ -234,7 +237,9 @@ ConvertUtils::HandleObjectType(const std::shared_ptr<Ctx>& ctx,
     if (!std::get<0>(to_map_tuple)) {
       return std::make_tuple(false, std::get<1>(to_map_tuple), false);
     }
-    auto ref = std::make_shared<JavaRef>(j_env, std::get<2>(to_map_tuple));
+    auto j_obj = std::get<2>(to_map_tuple);
+    auto ref = std::make_shared<JavaRef>(j_env, j_obj);
+    j_env->DeleteLocalRef(j_obj);
     global_refs.push_back(ref);
     j_args.l = ref->GetObj();
     return std::make_tuple(true, "", true);
@@ -246,8 +251,9 @@ ConvertUtils::HandleObjectType(const std::shared_ptr<Ctx>& ctx,
     if (!ctx->GetValueBoolean(value, &b)) {
       return std::make_tuple(false, "value must be boolean", false);
     }
-    auto ref = std::make_shared<JavaRef>(j_env,
-                                         j_env->NewObject(boolean_clazz, boolean_constructor, b));
+    auto j_obj = j_env->NewObject(boolean_clazz, boolean_constructor, b);
+    auto ref = std::make_shared<JavaRef>(j_env, j_obj);
+    j_env->DeleteLocalRef(j_obj);
     global_refs.push_back(ref);
     j_args.l = ref->GetObj();
     return std::make_tuple(true, "", true);
@@ -263,8 +269,9 @@ ConvertUtils::HandleObjectType(const std::shared_ptr<Ctx>& ctx,
     } else {
       return std::make_tuple(false, "value must be string", false);
     }
-
-    auto ref = std::make_shared<JavaRef>(j_env, j_env->NewStringUTF(str.c_str()));
+    auto j_obj = j_env->NewStringUTF(str.c_str());
+    auto ref = std::make_shared<JavaRef>(j_env, j_obj);
+    j_env->DeleteLocalRef(j_obj);
     global_refs.push_back(ref);
     j_args.l = ref->GetObj();
     return std::make_tuple(true, "", true);
@@ -277,8 +284,10 @@ ConvertUtils::HandleObjectType(const std::shared_ptr<Ctx>& ctx,
       if (!ctx->GetValueNumber(value, &num)) {
         return std::make_tuple(true, "value must be int", false);
       }
-      auto ref = std::make_shared<JavaRef>(j_env, j_env->NewObject(
-          integer_clazz, integer_constructor, num));
+      auto j_obj = j_env->NewObject(
+          integer_clazz, integer_constructor, num);
+      auto ref = std::make_shared<JavaRef>(j_env, j_obj);
+      j_env->DeleteLocalRef(j_obj);
       global_refs.push_back(ref);
       j_args.l = ref->GetObj();
     } else {
@@ -288,13 +297,17 @@ ConvertUtils::HandleObjectType(const std::shared_ptr<Ctx>& ctx,
       }
 
       if (type == kDoubleObject) {
-        auto ref = std::make_shared<JavaRef>(j_env, j_env->NewObject(
-            double_clazz, double_constructor, num));
+        auto j_obj = j_env->NewObject(
+            double_clazz, double_constructor, num);
+        auto ref = std::make_shared<JavaRef>(j_env, j_obj);
+        j_env->DeleteLocalRef(j_obj);
         global_refs.push_back(ref);
         j_args.l = ref->GetObj();
       } else if (type == kFloatObject) {
-        auto ref = std::make_shared<JavaRef>(j_env, j_env->NewObject(
-            float_clazz, float_constructor, static_cast<float>(num)));
+        auto j_obj = j_env->NewObject(
+            float_clazz, float_constructor, static_cast<float>(num));
+        auto ref = std::make_shared<JavaRef>(j_env, j_obj);
+        j_env->DeleteLocalRef(j_obj);
         global_refs.push_back(ref);
         j_args.l = ref->GetObj();
       } else if (type == kLongObject) {
@@ -302,8 +315,10 @@ ConvertUtils::HandleObjectType(const std::shared_ptr<Ctx>& ctx,
         if (!footstone::numeric_cast<double, jlong>(num, jlong_value)) {
           return std::make_tuple(true, "value out of jlong boundary", false);
         }
-        auto ref = std::make_shared<JavaRef>(j_env, j_env->NewObject(
-            long_clazz, long_constructor, jlong_value));
+        auto j_obj = j_env->NewObject(
+            long_clazz, long_constructor, jlong_value);
+        auto ref = std::make_shared<JavaRef>(j_env, j_obj);
+        j_env->DeleteLocalRef(j_obj);
         global_refs.push_back(ref);
         j_args.l = ref->GetObj();
       } else {
diff --git a/modules/footstone/include/footstone/cv_driver.h b/modules/footstone/include/footstone/cv_driver.h
index e79621c421b..de6a1698290 100644
--- a/modules/footstone/include/footstone/cv_driver.h
+++ b/modules/footstone/include/footstone/cv_driver.h
@@ -35,13 +35,12 @@ class CVDriver: public Driver {
   virtual ~CVDriver() = default;
 
   virtual void Notify() override;
-  virtual void WaitFor(const TimeDelta& delta) override;
+  virtual void WaitFor(const TimeDelta& delta, std::unique_lock<std::mutex>& lock) override;
   virtual void Start() override;
   virtual void Terminate() override;
 
  private:
   std::condition_variable cv_;
-  std::mutex mutex_;
 };
 
 }
diff --git a/modules/footstone/include/footstone/driver.h b/modules/footstone/include/footstone/driver.h
index 81417dbe2c9..c18869e6741 100644
--- a/modules/footstone/include/footstone/driver.h
+++ b/modules/footstone/include/footstone/driver.h
@@ -23,7 +23,7 @@
 #pragma once
 
 #include <functional>
-
+#include <mutex>
 #include "footstone/time_delta.h"
 
 namespace footstone {
@@ -35,7 +35,8 @@ class Driver {
   virtual ~Driver() = default;
 
   virtual void Notify() = 0;
-  virtual void WaitFor(const TimeDelta& delta) = 0;
+  std::mutex& Mutex() { return mutex_; }
+  virtual void WaitFor(const TimeDelta& delta, std::unique_lock<std::mutex>& lock) = 0;
   virtual void Start() = 0;
   virtual void Terminate() = 0;
 
@@ -60,6 +61,8 @@ class Driver {
    *
    */
   bool is_exit_immediately_;
+
+  std::mutex mutex_;
 };
 
 }
diff --git a/modules/footstone/include/footstone/platform/adr/looper_driver.h b/modules/footstone/include/footstone/platform/adr/looper_driver.h
index 213dd9c3042..e6f4e5053dc 100644
--- a/modules/footstone/include/footstone/platform/adr/looper_driver.h
+++ b/modules/footstone/include/footstone/platform/adr/looper_driver.h
@@ -36,7 +36,7 @@ class LooperDriver: public Driver {
   virtual ~LooperDriver();
 
   virtual void Notify() override;
-  virtual void WaitFor(const TimeDelta& delta) override;
+  virtual void WaitFor(const TimeDelta& delta, std::unique_lock<std::mutex>& lock) override;
   virtual void Start() override;
   virtual void Terminate() override;
 
diff --git a/modules/footstone/include/footstone/platform/ios/looper_driver.h b/modules/footstone/include/footstone/platform/ios/looper_driver.h
index 1ec849a044f..1e07e2c90e8 100644
--- a/modules/footstone/include/footstone/platform/ios/looper_driver.h
+++ b/modules/footstone/include/footstone/platform/ios/looper_driver.h
@@ -35,10 +35,10 @@ class LooperDriver: public Driver {
   virtual ~LooperDriver();
 
   virtual void Notify() override;
-  virtual void WaitFor(const TimeDelta& delta) override;
+  virtual void WaitFor(const TimeDelta& delta, std::unique_lock<std::mutex>& lock) override;
   virtual void Start() override;
   virtual void Terminate() override;
-  
+
   void OnTimerFire(CFRunLoopTimerRef timer);
 
  private:
diff --git a/modules/footstone/include/footstone/task_runner.h b/modules/footstone/include/footstone/task_runner.h
index 356d87b36d2..b83a124ecff 100644
--- a/modules/footstone/include/footstone/task_runner.h
+++ b/modules/footstone/include/footstone/task_runner.h
@@ -122,6 +122,8 @@ class TaskRunner {
   std::unique_ptr<IdleTask> PopIdleTask();
   std::unique_ptr<Task> GetTopDelayTask();
   std::unique_ptr<Task> GetNext();
+  bool HasTask();
+  bool HasMoreUrgentTask(TimeDelta min_wait_time, TimePoint now);
 
   std::queue<std::unique_ptr<Task>> task_queue_;
   std::mutex queue_mutex_;
diff --git a/modules/footstone/include/footstone/worker.h b/modules/footstone/include/footstone/worker.h
index 31134f8b3b9..a4df43c9da0 100644
--- a/modules/footstone/include/footstone/worker.h
+++ b/modules/footstone/include/footstone/worker.h
@@ -102,6 +102,9 @@ class Worker {
   void BalanceNoLock();
   void SortNoLock();
 
+  bool HasTask();
+  bool HasMoreUrgentTask(TimeDelta min_wait_time, TimePoint now);
+
   int32_t WorkerKeyCreate(uint32_t task_runner_id, const std::function<void(void *)>& destruct);
   bool WorkerKeyDelete(uint32_t task_runner_id, int32_t key);
   bool WorkerSetSpecific(uint32_t task_runner_id, int32_t key, void *p);
diff --git a/modules/footstone/src/cv_driver.cc b/modules/footstone/src/cv_driver.cc
index 7356c419aa7..ff180f7100e 100644
--- a/modules/footstone/src/cv_driver.cc
+++ b/modules/footstone/src/cv_driver.cc
@@ -24,12 +24,11 @@ namespace footstone {
 inline namespace runner {
 
 void CVDriver::Notify() {
+  std::unique_lock<std::mutex> lock(mutex_);
   cv_.notify_one();
 }
 
-void CVDriver::WaitFor(const TimeDelta& delta) {
-  std::unique_lock<std::mutex> lock(mutex_);
-
+void CVDriver::WaitFor(const TimeDelta& delta, std::unique_lock<std::mutex>& lock) {
   if (delta != TimeDelta::Max() && delta >= TimeDelta::Zero()) {
     cv_.wait_for(lock, std::chrono::nanoseconds(delta.ToNanoseconds()));
   } else {
diff --git a/modules/footstone/src/platform/adr/looper_driver.cc b/modules/footstone/src/platform/adr/looper_driver.cc
index 22ea02c9daa..96a3b371122 100644
--- a/modules/footstone/src/platform/adr/looper_driver.cc
+++ b/modules/footstone/src/platform/adr/looper_driver.cc
@@ -57,7 +57,7 @@ void LooperDriver::Notify() {
   timerfd_settime(fd_, TFD_TIMER_ABSTIME, &spec, nullptr);
 }
 
-void LooperDriver::WaitFor(const TimeDelta& delta) {
+void LooperDriver::WaitFor(const TimeDelta& delta, std::unique_lock<std::mutex>& lock) {
   auto nano_secs = delta.ToNanoseconds();
   if (nano_secs < 1) {
     nano_secs = 1;
diff --git a/modules/footstone/src/platform/ios/looper_driver.cc b/modules/footstone/src/platform/ios/looper_driver.cc
index b817da01eac..eac5e0d0bcb 100644
--- a/modules/footstone/src/platform/ios/looper_driver.cc
+++ b/modules/footstone/src/platform/ios/looper_driver.cc
@@ -56,7 +56,7 @@ void LooperDriver::Notify() {
       CFAbsoluteTimeGetCurrent());
 }
 
-void LooperDriver::WaitFor(const TimeDelta& delta) {
+void LooperDriver::WaitFor(const TimeDelta& delta, std::unique_lock<std::mutex>& lock) {
   CFRunLoopTimerSetNextFireDate(
       delayed_wake_timer_,
       CFAbsoluteTimeGetCurrent() + delta.ToSecondsF());
diff --git a/modules/footstone/src/task_runner.cc b/modules/footstone/src/task_runner.cc
index b8a60590a26..108ca7a6340 100644
--- a/modules/footstone/src/task_runner.cc
+++ b/modules/footstone/src/task_runner.cc
@@ -266,5 +266,53 @@ void TaskRunner::RunnerDestroySpecifics() {
   return worker->WorkerDestroySpecific(task_runner_id);
 }
 
+bool TaskRunner::HasTask() {
+  {
+    std::lock_guard<std::mutex> lock(queue_mutex_);
+    if (!task_queue_.empty()) {
+      return true;
+    }
+  }
+  {
+    std::lock_guard<std::mutex> lock(delay_mutex_);
+    if (!delayed_task_queue_.empty()) {
+      return true;
+    }
+  }
+  {
+    std::lock_guard<std::mutex> lock(idle_mutex_);
+    if (!idle_task_queue_.empty()) {
+      return true;
+    }
+  }
+  return false;
+}
+
+bool TaskRunner::HasMoreUrgentTask(TimeDelta min_wait_time, TimePoint now) {
+  {
+    std::lock_guard<std::mutex> lock(queue_mutex_);
+    if (!task_queue_.empty()) {
+      return true;
+    }
+  }
+  {
+    std::lock_guard<std::mutex> lock(idle_mutex_);
+    if (!idle_task_queue_.empty()) {
+      return true;
+    }
+  }
+  {
+    std::lock_guard<std::mutex> lock(delay_mutex_);
+    if (!delayed_task_queue_.empty()) {
+      const DelayedEntry& delayed_task = delayed_task_queue_.top();
+      if(delayed_task.first - now < min_wait_time) {
+        return true;
+      }
+    }
+  }
+
+  return false;
+}
+
 } // namespace runner
 }  // namespace footstone
diff --git a/modules/footstone/src/worker.cc b/modules/footstone/src/worker.cc
index b6b8e5fd9e3..d82b036db61 100644
--- a/modules/footstone/src/worker.cc
+++ b/modules/footstone/src/worker.cc
@@ -402,10 +402,20 @@ std::unique_ptr<Task> Worker::GetNextTask() {
         }));
     return wrapper_idle_task;
   }
+  std::unique_lock<std::mutex> lock(driver_->Mutex());
   if (driver_->IsTerminated()) {
     return nullptr;
   }
-  driver_->WaitFor(min_wait_time_);
+  if (min_wait_time_ == TimeDelta::Max()) {
+    if (HasTask()) {
+      return nullptr;
+    }
+  } else {
+    if (HasMoreUrgentTask(min_wait_time_, now)) {
+      return nullptr;
+    }
+  }
+  driver_->WaitFor(min_wait_time_, lock);
   return nullptr;
 }
 
@@ -532,5 +542,63 @@ void Worker::UpdateSpecific(uint32_t task_runner_id,
   specific_map_[task_runner_id] = array;  // insert or update
 }
 
+bool Worker::HasTask() {
+  bool has_found = false;
+  for (auto &group : running_group_list_) {
+    for (auto &runner : group) {
+      if (runner->HasTask()) {
+        has_found = true;
+        break;
+      }
+    }
+    if (has_found) {
+      break;
+    }
+  }
+  if (!has_found) {
+    for (auto &group : pending_group_list_) {
+      for (auto &runner : group) {
+        if (runner->HasTask()) {
+          has_found = true;
+          break;
+        }
+      }
+      if (has_found) {
+        break;
+      }
+    }
+  }
+  return has_found;
+}
+
+bool Worker::HasMoreUrgentTask(TimeDelta min_wait_time, TimePoint now) {
+  bool has_found = false;
+  for (auto &group : running_group_list_) {
+    for (auto &runner : group) {
+      if (runner->HasMoreUrgentTask(min_wait_time, now)) {
+        has_found = true;
+        break;
+      }
+    }
+    if (has_found) {
+      break;
+    }
+  }
+  if (!has_found) {
+    for (auto &group : pending_group_list_) {
+      for (auto &runner : group) {
+        if (runner->HasMoreUrgentTask(min_wait_time, now)) {
+          has_found = true;
+          break;
+        }
+      }
+      if (has_found) {
+        break;
+      }
+    }
+  }
+  return has_found;
+}
+
 } // namespace runner
 } // namespace footstone