diff --git a/src/timer.rs b/src/timer.rs
index 7ba9538..3e0be67 100644
--- a/src/timer.rs
+++ b/src/timer.rs
@@ -75,25 +75,21 @@ impl Timer {
                 get_tick_count: fn () -> i64,
                 gctime: i32,
                 cache_timer_num: i32) {
+        let init_timer_list = |tv: &mut [TimerListListHeadRp]| {
+            for i in 0..tv.len() {
+                tv[i] = crate::ListHead::<TimerList>::new_head();
+            }
+        };
+
         self.get_tick_count = get_tick_count;
         self.cache_timer_num = cache_timer_num;
         self.free_timer_num = 0;
         self.work_list = crate::ListHead::<TimerList>::new_head();
-        for i in 0..self.tv1.len() {
-            self.tv1[i] = crate::ListHead::<TimerList>::new_head();
-        }
-        for i in 0..self.tv2.len() {
-            self.tv2[i] = crate::ListHead::<TimerList>::new_head();
-        }
-        for i in 0..self.tv3.len() {
-            self.tv3[i] = crate::ListHead::<TimerList>::new_head();
-        }
-        for i in 0..self.tv4.len() {
-            self.tv4[i] = crate::ListHead::<TimerList>::new_head();
-        }
-        for i in 0..self.tv5.len() {
-            self.tv5[i] = crate::ListHead::<TimerList>::new_head();
-        }
+        init_timer_list(&mut self.tv1);
+        init_timer_list(&mut self.tv2);
+        init_timer_list(&mut self.tv3);
+        init_timer_list(&mut self.tv4);
+        init_timer_list(&mut self.tv5);
         self.timer_tick = (self.get_tick_count)();
         let self_wp = self.shared_from_self();
         let cb = Box::new(
@@ -306,7 +302,8 @@ impl Timer {
     }
 
     pub fn get_idle_time(&self) -> i64 {
-        return 0;
+        let mut idle_time = 0;
+        return idle_time;
     }
 
     fn gc_timer(&mut self, e: TimerEvent, _args: Option<Vec<Rc::<dyn Any>>>) {
@@ -314,13 +311,10 @@ impl Timer {
             TimerEvent::Exec => {
                 while self.free_timer_num > self.cache_timer_num &&
                     !self.free_timer_list.borrow().empty() {
-                        let timer = &self.free_timer_list.borrow().first_entry();
-                        timer.upgrade().unwrap().borrow_mut().timer_entry.borrow_mut().del_init();
+                        let timer = &self.free_timer_list.borrow().first_entry().upgrade().unwrap();
+                        timer.borrow_mut().timer_entry.borrow_mut().del_init();
                         self.free_timer_num -= 1;
                 }
-            }
-            TimerEvent::Custom(_v) => {
-
             }
             _ => {