Run results for: replaceWith vs replaceChild

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

replaceWith

123/s

replaceChild

95/s

View exact numbers

Test name	Executions per second
✓ replaceWith	123 Ops/sec
replaceChild	95 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]); }