Run results for: querySelector (NODE TO NODE) vs querySelectorAll

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36

Browser: Chrome 98

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
querySelector from one node to next	4707553.5 Ops/sec
querySelectorAll	2165107.0 Ops/sec

HTML Preparation code:

<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>

Tests:

querySelector from one node to next
let node = document.querySelector('.test', element => { element.classList.add("read"); }); while(node) { node = node.querySelector('.test', element => { element.classList.add("read"); }); }
querySelectorAll
document.querySelectorAll(".test", elements => { elements.forEach(element => { element.classList.add("read") }) })

Run results for: querySelector (NODE TO NODE) vs querySelectorAll

querySelector from one node to next

querySelectorAll