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Measuring speed of operations that append to DOM
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<!doctype html> | |
<html> | |
<body> | |
<div id="target"></div> | |
<template> | |
<ul> | |
<li><a>Item #0</a></li> | |
<li><a>Item #1</a></li> | |
<li><a>Item #2</a></li> | |
<li><a>Item #3</a></li> | |
<li><a>Item #4</a></li> | |
<li><a>Item #5</a></li> | |
<li><a>Item #6</a></li> | |
<li><a>Item #7</a></li> | |
<li><a>Item #8</a></li> | |
<li><a>Item #9</a></li> | |
</ul> | |
</template> | |
<script> | |
// Setup | |
var target = document.getElementById('target') | |
var tpl = document.querySelector('template') | |
var fragment = new DocumentFragment() | |
var list = document.createElement('ul') | |
for(var i=0; i<10; i++) { | |
var li = document.createElement('li'), | |
a = document.createElement('a') | |
a.textContent = 'Item #' + i | |
li.appendChild(a) | |
list.appendChild(li) | |
} | |
fragment.appendChild(list) | |
var contentString = '<ul>' | |
for(var i=0; i<10; i++) contentString += '<li><a>Item #' + i + '</a></li>' | |
contentString += '</ul>' | |
// Running the tests | |
window.onload = function() { | |
var tStart = performance.now() | |
for(var t=0; t<10000; t++) { | |
//runTest0() // 1717175ms | |
//runTest1() // 642ms | |
//runTest2() // 222ms | |
//runTest3() // 211ms | |
//runTest4() // 1272ms | |
//runTest5() // 380ms | |
} | |
console.log(performance.now() - tStart) | |
} | |
function runTest0() { | |
target.innerHTML += contentString | |
} | |
function runTest1() { | |
var list = document.createElement('ul') | |
for(var i=0; i<10; i++) { | |
var li = document.createElement('li'), | |
a = document.createElement('a') | |
a.textContent = 'Item #' + i | |
li.appendChild(a) | |
list.appendChild(li) | |
} | |
target.appendChild(list) | |
} | |
// Using a DocumentFragment | |
function runTest2() { | |
target.appendChild(document.importNode(fragment, true)) | |
} | |
// Using a <template> | |
function runTest3() { | |
var clone = document.importNode(tpl.content, true) | |
target.appendChild(clone) | |
} | |
// Using createContextualFragment | |
function runTest4() { | |
var range = document.createRange(); | |
range.selectNode(target); | |
var documentFragment = range.createContextualFragment(contentString); | |
document.body.appendChild(documentFragment); | |
} | |
// Using insertAdjacentHTML | |
function runTest5() { | |
target.insertAdjacentHTML('beforeend', contentString) | |
} | |
</script> | |
</body> | |
</html> |
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