Run results for: replaceWith vs replaceChild

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.99 Safari/537.36

Browser: Chrome 97

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
replaceWith	14.6 Ops/sec
replaceChild	9.6 Ops/sec

HTML Preparation code:

<html>

  
  
</html>

Script Preparation code:

parentBox = document.createElement('div');
document.body.appendChild(parentBox);

Tests:

replaceWith
var Iframe1 = []; var Video1 = []; for (var i = 0; i < 10; i++) { Iframe1[i] = document.createElement('iframe'); parentBox.appendChild(Iframe1[i]); Video1[i] = document.createElement('video'); } for (var w = 9; w > -1; w--) { Iframe1[w].replaceWith(Video1[w]); }
replaceChild
var Iframe2 = []; var Video2 = []; for (var i = 0; i < 10; i++) { Iframe2[i] = document.createElement('iframe'); parentBox.appendChild(Iframe2[i]); Video2[i] = document.createElement('video'); } for (var c = 9; c > -1; c--) { parentBox.replaceChild(Video2[c], Iframe2[c]); }