Vue

by antixrist

HTML

<div id="app">

  <span v-text="notOptimized"></span>
  <span v-text="optimized"></span>
  
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

Babel + JSX

new Vue({
  el: "#app",

  computed: {
  	staticData() {
    	console.log('call "staticData"');
      return 42
    },
    notOptimized() {
    	console.time('notOptimized')
      let result = 0;
      
      for (let i = 0; i < 100000000; i++) {
        result += this.staticData;
      }
      console.timeEnd('notOptimized')
      
      return result;
    },
    optimized() {
    	console.time('optimized')
      let result = 0;
      const { staticData } = this
      
      for (let i = 0; i < 100000000; i++) {
        result += staticData;
      }
      console.timeEnd('optimized')
      
      return result;
    },
    
  }
})