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Run results for: replaceChild vs replaceChildren vs documentFragment

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Run details:
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/113.0
Firefox 113
Ubuntu
Desktop
one year ago
Test name Executions per second
replaceChild 1800324.8 Ops/sec
replaceChildren 807403.2 Ops/sec
append documentFragment 770236.8 Ops/sec
HTML Preparation code:
AخA
 
1
<div id="container"></div>
Script Preparation code:
​x
 
var elements = [document.createElement('div'), document.createElement('div')];
var fragment = document.createDocumentFragment();
var container = document.getElementById('container');
​
elements.forEach(element => fragment.appendChild(element));
container.appendChild(fragment);
Tests:

  • replaceChild

     
    var changeIndex = 1;
    elements[changeIndex] = document.createElement('div');
    container.replaceChild(elements[changeIndex], container.children[changeIndex]);

  • replaceChildren

     
    var changeIndex = 1;
    elements[changeIndex] = document.createElement('div');
    container.replaceChildren(elements)

  • append documentFragment

     
    var changeIndex = 1;
    var newChildren = document.createDocumentFragment();
    ​
    elements[changeIndex] = document.createElement('div');
    elements.forEach(element => newChildren.appendChild(element));
    ​
    while(container.firstChild) {
      container.firstChild.remove(); 
    }
    ​
    container.appendChild(newChildren)