JSFiddle - React, Tailwind, and code Playground

HTML

<p><span id='s'></span></p>
<table border='2'>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
    <tr><td>1</td><td>2</td></tr>
   ...

JavaScript

$(function () {
            var stime = GetNow();
            $('table tr').each(function () {
                $(this).children().eq(0).hide();
            });
            var etime = GetNow();
            var ptime = etime - stime;
            $('#s').text('經過時間' + ptime + '毫秒');


            function GetNow() {
                var d = new Date();
                return d.getTime(); ;
            }
        });