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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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