AnimationFrame: 增加帧率的耗时

pages/API/animation-frame/animation-frame.uvue

@@ -3,7 +3,7 @@
     <page-head :title="title"></page-head>
     <button @click="startRequestAnimationFrame">requestAnimationFrame</button>
     <button @click="stopRequestAnimationFrame">cancelAnimationFrame</button>
-    <text class="frame-count">FPS: {{fps}}</text>
+    <text class="frame-count">FPS: {{fps}} / {{formatFPSTime}}</text>
     <text class="frame-count">FrameCount: {{testFrameCount}}</text>
     <text class="tips">提示: 在当前测试例子中，每增加一次调用 requestAnimationFrame 帧率翻倍，cancelAnimationFrame 后恢复</text>
   </view>
@@ -15,7 +15,8 @@
       return {
         title: 'AnimationFrame',
         taskId: 0,
-        fps: 0,
+        fps: 0,
+        formatFPSTime: '0ms',
         lastTime: 0,
         frameCount: 0,
         testFrameCount: 0
@@ -30,7 +31,8 @@
       startRequestAnimationFrame() {
         this.taskId = requestAnimationFrame((timestamp : number) => {
           this.frameCount++
-          if (timestamp - this.lastTime >= 1000) {
+          if (timestamp - this.lastTime >= 1000) {
+            this.formatFPSTime = (1000 / this.frameCount).toFixed(3) + 'ms'
             this.fps = this.frameCount
             this.frameCount = 0
             this.lastTime = timestamp
@@ -42,6 +44,7 @@
       },
       stopRequestAnimationFrame() {
         this.fps = 0
+        this.formatFPSTime = '0ms'
         this.lastTime = 0
         this.frameCount = 0
         cancelAnimationFrame(this.taskId)