diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index 98360ce9..8b9f7224 100755
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -44,7 +44,7 @@
   <!-- notification category -->
   <string name="forward_success">Shadowsocks started.</string>
   <string name="service_running">Running in the background.</string>
-  <string name="service_status" formatted="false">Upload: %d KB/s, Download: %d KB/s</string>
+  <string name="service_status" formatted="false">Upload: %d KB/s\t|\tDownload: %d KB/s</string>
   <string name="forward_fail">Shadowsocks failed to start.</string>
   <string name="service_stopped">Shadowsocks stopped.</string>
   <string name="forward_stop">Shadowsocks stopped.</string>
diff --git a/src/main/scala/com/github/shadowsocks/ShadowsocksService.scala b/src/main/scala/com/github/shadowsocks/ShadowsocksService.scala
index 02ff385e..f0fcd329 100644
--- a/src/main/scala/com/github/shadowsocks/ShadowsocksService.scala
+++ b/src/main/scala/com/github/shadowsocks/ShadowsocksService.scala
@@ -120,8 +120,10 @@ class ShadowsocksService extends Service {
   private var state = State.INIT
   private var last = new TrafficStat(TrafficStats.getTotalTxBytes,
     TrafficStats.getTotalRxBytes, java.lang.System.currentTimeMillis())
+  private var lastTxRate = 0
+  private var lastRxRate = 0
   private val timer = new Timer(true)
-  private val TIMER_INTERVAL = 5
+  private val TIMER_INTERVAL = 1
 
   private def changeState(s: Int) {
     if (state != s) {
@@ -412,13 +414,19 @@ class ShadowsocksService extends Service {
       def run() {
         val now = new TrafficStat(TrafficStats.getTotalTxBytes,
           TrafficStats.getTotalRxBytes, java.lang.System.currentTimeMillis())
-        val txRate = (now.tx - last.tx) / 1024 / TIMER_INTERVAL
-        val rxRate = (now.rx - last.rx) / 1024 / TIMER_INTERVAL
+        val txRate = ((now.tx - last.tx) / 1024 / TIMER_INTERVAL).toInt
+        val rxRate = ((now.rx - last.rx) / 1024 / TIMER_INTERVAL).toInt
         last = now
+        if (lastTxRate == txRate && lastRxRate == rxRate) {
+          return
+        } else {
+          lastTxRate = txRate
+          lastRxRate = rxRate
+        }
         if (state == State.CONNECTED) {
           Log.d(TAG, getString(R.string.service_status).format(txRate, rxRate))
           notifyForegroundAlert(getString(R.string.forward_success),
-            getString(R.string.service_status).format(txRate, rxRate), txRate.toInt + rxRate.toInt)
+            getString(R.string.service_status).format(txRate, rxRate), txRate + rxRate)
         }
       }
     }