perf(lanzou): optimize the use of list cache (#2956)

* fix:local sort not cache

* perf(lanzou): Optimize the use of list cache

pkg/utils/time.go

@@ -1,8 +1,37 @@
 package utils
 
-import "time"
+import (
+	"sync"
+	"time"
+)
 
 func MustParseCNTime(str string) time.Time {
 	lastOpTime, _ := time.ParseInLocation("2006-01-02 15:04:05 -07", str+" +08", time.Local)
 	return lastOpTime
 }
+
+func NewDebounce(interval time.Duration) func(f func()) {
+	var timer *time.Timer
+	var lock sync.Mutex
+	return func(f func()) {
+		lock.Lock()
+		defer lock.Unlock()
+		if timer != nil {
+			timer.Stop()
+		}
+		timer = time.AfterFunc(interval, f)
+	}
+}
+
+func NewDebounce2(interval time.Duration, f func()) func() {
+	var timer *time.Timer
+	var lock sync.Mutex
+	return func() {
+		lock.Lock()
+		defer lock.Unlock()
+		if timer == nil {
+			timer = time.AfterFunc(interval, f)
+		}
+		(*time.Timer)(timer).Reset(interval)
+	}
+}