Benchmark: querySelectorAll vs. querySelector + querySelectorAll vs. getElementById + querySelectorAll

HTML Preparation code:

<div id="someId">
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
</div>
<div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
    <div class="someClass"></div>
</div>

Tests:

querySelectorAll
const matches = document.querySelectorAll('#someId .someClass'); matches.forEach(() => {});
querySelector + querySelectorAll
const matches = document.querySelector('#someId').querySelectorAll('.someClass'); matches.forEach(() => {});
getElementById + querySelectorAll
const matches = document.getElementById('someId').querySelectorAll('.someClass'); matches.forEach(() => {});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
querySelectorAll
querySelector + querySelectorAll
getElementById + querySelectorAll

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 7 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36

Browser/OS: Chrome 142 on Linux

View result in a separate tab

getElementById + querySelectorAll

863K/s

querySelector + querySelectorAll

784K/s

querySelectorAll

549K/s

View exact numbers

Test name	Executions per second
✓ getElementById + querySelectorAll	862,949 Ops/sec
querySelector + querySelectorAll	783,844 Ops/sec
querySelectorAll	549,461 Ops/sec

querySelectorAll vs. querySelector + querySelectorAll vs. getElementById + querySelectorAll (version: 1)

Comparing performance of: `querySelectorAll vs querySelector + querySelectorAll vs getElementById + querySelectorAll`

Created: 7 months ago by: Guest

Go to the latest result

querySelectorAll

querySelector + querySelectorAll

getElementById + querySelectorAll

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

querySelectorAll vs. querySelector + querySelectorAll vs. getElementById + querySelectorAll (version: 1)

Comparing performance of: querySelectorAll vs querySelector + querySelectorAll vs getElementById + querySelectorAll

Created: 7 months ago by: Guest

Go to the latest result

querySelectorAll

querySelector + querySelectorAll

getElementById + querySelectorAll

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `querySelectorAll vs querySelector + querySelectorAll vs getElementById + querySelectorAll`