试试看吧

testSpeed.js

@@ -4,6 +4,7 @@ let total = 0;
 let total2 = 0;
 let time = 0;
 let lastData = null;
+let lastTimestamp = 0;
 
 setInterval(()=>{
   run();
@@ -22,10 +23,11 @@ function run() {
     total2 += ((after - before) - total / time) * ((after - before) - total / time);
     // console.log('平均值：' + (total / time) + ' 标准差：' + Math.sqrt(total2 / time));
     // console.log(data);
-    if (lastData) {
+    if (lastData && data.timeStamp > lastTimestamp) {
       if (JSON.stringify(lastData) != JSON.stringify(data)) {
         console.log("diff@" + data.timestamp)
       }
+      lastTimestamp = data.timeStamp;
     }
     lastData = data;
   });