vue react 与原生 js jquery 渲染时间简单对比

发布时间：2020-12-15 09:36:00 所属栏目：百科来源：网络整理

导读：!DOCTYPE html html lang="en" head meta charset="UTF-8" meta name="viewport" content="width=device-width,initial-scale=1.0" meta http-equiv="X-UA-Compatible" content="ie=edge" titleDocument/title script src="./js/vue.js"/script /head body d

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width,initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <script src="./js/vue.js"></script> </head> <body> <div id="app"> <ul> <li v-for="item in arrayData">{{item}}</li> </ul> </div> <script> var vm = new Vue({ el: "#app",data: () => ({ arrayData: ["e1","e2","e3","e4"] }) }) </script> </body> </html>

vue 下载到了本地，那么渲染页面用了多长时间呢？
利用谷歌performance 可以看到

总共用了38.1ms

而用原生的js 达到同样效果

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <ul id="ul">

        </ul>
    </div>
    <script>
        var fragement = document.createDocumentFragment();
        var arrayData = ["e1","e4"];
        for (var item in arrayData) {
            var li = document.createElement(‘li‘);
            li.innerText = arrayData[item];
            fragement.appendChild(li);
        }
        document.getElementById(‘ul‘).appendChild(fragement);
    </script>
</body>

</html>

用时多少呢？

仅仅只有 9.8ms 哦，
当然vue的优势在于mvvm的方式不能只通过这一项就说vue不好。
这个数据仅供参考

我们再来看下jquery

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <ul id="ul">

        </ul>
    </div>
    <script src="./js/jquery3.4.1.js"></script>
    <script>
        $(function () {
            var arrayData = ["e1","e4"];
            var html = ""
            arrayData.forEach((item) => {
                html += "<li>" + item + "</li>"
            });
            $("#ul").append(html);
        });
    </script>
</body>

</html>

11.8ms 可以说和原生js 很接近了

主要来看下react

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
        //为了公平将资源下载到了本地
        <!--
            <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script>
<script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script>
<script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script>
        -->
    <script src="./js/react.16.8.6.js"></script>
    <script src="./js/reactDom16.8.6.js"></script>
    <!-- 生产环境中不建议使用 -->
    <script src="./js/babel.min.js"></script>
</head>

<body>
    <div id="example"></div>
    <script type="text/babel">
         var arrayData = ["e1","e4"];
        ReactDOM.render(
            arrayData.map((item,key)=>{
                return <li key={key}>{item}</li>
            }),document.getElementById(‘example‘)
        );
        </script>
</body>

</html>

164ms

比vue 的38ms几乎多了4倍！

结论：
单从网页引入的方式来看

耗费时间是 react>vue>jquery>js 的

（编辑：李大同）

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