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199 lines
5.0 KiB
199 lines
5.0 KiB
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>Vue benchmark</title>
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<style type="text/css">
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html, body {
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margin: 0;
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padding: 0;
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font-family: sans-serif;
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}
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#fps {
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position: fixed;
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top: 0px;
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right: 0px;
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padding: 32px;
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font-size: 32px;
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text-align: right;
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}
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* {
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box-sizing: border-box;
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}
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.server-uptime {
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display: block;
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overflow: hidden;
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margin: 0 auto;
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width: 50%;
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}
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.server-uptime + .server-uptime {
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margin: 20px auto 0 auto;
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border-top: 1px solid #999;
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}
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.days {
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display: flex;
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flex-direction: row;
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flex-flow: wrap;
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}
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.uptime-day {
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display: flex;
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}
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span.uptime-day-status {
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width: 10px;
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height: 10px;
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margin: 1px;
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}
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.hover {
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display: none;
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}
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.uptime-day-status:hover + .hover {
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display: flex;
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position: absolute;
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margin-top: -35px;
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margin-left: -30px;
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border-radius: 4px;
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color: #eee;
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background-color: #333;
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padding: 10px;
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font-size: 11px;
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}
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</style>
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</head>
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<body>
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<div id="app">
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<p>FPS: {{ fps }}</p>
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<button @click="toggle">{{ playing ? 'pause' : 'play' }}</button>
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<server-uptime
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v-for="server in servers"
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:key="server.name"
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:name="server.name"
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:days="server.days">
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</server-uptime>
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</div>
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<script src="../../dist/vue.min.js"></script>
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<script>
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// functional components are prefect for small, presentational components
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// and they are much more efficient than stateful ones.
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Vue.component('uptime-day', {
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props: ['day'],
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functional: true,
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render (h, ctx) {
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var day = ctx.props.day
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return h('div', { staticClass: 'uptime-day'}, [
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h('span', { staticClass: 'uptime-day-status', style: { backgroundColor: day.up ? '#8cc665' : '#ccc' } }),
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h('span', { staticClass: 'hover' }, [day.number + ': ' + day.up ? 'Servers operational!' : 'Red alert!'])
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])
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}
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})
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Vue.component('server-uptime', {
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props: ['name', 'days'],
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computed: {
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upDays () {
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return this.days.reduce(function (upDays, day) {
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return upDays += (day.up ? 1 : 0)
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}, 0)
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},
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maxStreak () {
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var streak = this.days.reduce(([max, streak], day) => {
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if (day.up && streak + 1 > max) {
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return [streak + 1, streak + 1]
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} else if (day.up) {
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return [max, streak + 1]
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} else {
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return [max, 0]
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}
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}, [0, 0])
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return streak.max
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}
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},
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template: `
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<div class="server-uptime">
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<h1>{{name}}</h1>
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<h2>{{upDays}} Days Up</h2>
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<h2>Biggest Streak: {{maxStreak}}</h2>
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<div class="days">
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<uptime-day
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v-for="day in days"
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:key="day.number"
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:day="day">
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</uptime-day>
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</div>
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</div>
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`
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})
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function generateServer (name) {
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var days = []
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for (var i=0; i<=364; i++) {
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var up = Math.random() > 0.2
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days.push({ number: i, up })
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}
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return { name, days }
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}
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function generateServers () {
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return [
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generateServer("Stefan's Server"),
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generateServer("Godfrey's Server"),
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generateServer("Yehuda's Server")
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]
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}
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var s = window.performance.now()
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var app = new Vue({
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el: '#app',
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data: {
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fps: 0,
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playing: false,
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servers: Object.freeze(generateServers())
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},
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methods: {
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toggle () {
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this.playing = !this.playing
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if (this.playing) {
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update()
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} else {
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clearTimeout(timeoutId)
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}
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}
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}
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})
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console.log('initial render: ' + (window.performance.now() - s) + 'ms')
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var fpsMeter = {
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alpha: 2/121,
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lastValue: null,
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push (dataPoint) {
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if (this.lastValue) {
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return this.lastValue = this.lastValue + this.alpha * (dataPoint - this.lastValue)
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} else {
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return this.lastValue = dataPoint
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}
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}
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}
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var timeoutId
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var lastFrame = null
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function update () {
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var thisFrame = window.performance.now()
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if (lastFrame) {
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app.fps = Math.round(fpsMeter.push(1000 / (thisFrame - lastFrame)))
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}
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app.servers = Object.freeze(generateServers())
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timeoutId = setTimeout(update, 0) // not using rAF because that limits us to 60fps!
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lastFrame = thisFrame
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}
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</script>
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</body>
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</html>
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