Benchmark: TreeWalker vs querySelectorAll vs getElementsByTagName

HTML Preparation code:
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Tests:
TreeWalker
const treeWalker = document.createTreeWalker( document.body, NodeFilter.SHOW_ELEMENT ); const titles = []; let title; while (title = treeWalker.nextNode()) { if (title.nodeName === 'H1') { titles.push(title.textContent); } }
querySelectorAll
const titles = []; const elements = document .body .querySelectorAll('h1'); for (let i = 0, title; (title = elements[i]); i += 1) { titles.push(title.textContent); }
getElementsByTagName
const titles = []; const elements = document .body .getElementsByTagName('h1'); for (let i = 0, title; (title = elements[i]); i += 1) { titles.push(title.textContent); }
Rendered benchmark preparation results:
Suite status: <idle, ready to run>

Previous results
Test case name	Result
TreeWalker
querySelectorAll
getElementsByTagName
Fastest: N/A

Slowest: N/A

Latest run results:
Run details: (Test run date: one year ago)
User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36
Browser/OS: Chrome 132 on Mac OS X 10.15.7
View result in a separate tab
Test name	Executions per second
TreeWalker	28428.0 Ops/sec
querySelectorAll	43238.0 Ops/sec
getElementsByTagName	83321.5 Ops/sec
Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.
It appears that you are providing benchmark results for three different methods of accessing HTML elements: `getElementsByTagName`, `querySelectorAll`, and `TreeWalker`. The benchmarks were run on Chrome 121, on Windows, using a desktop device.
Based on the latest benchmark result, it seems that:
* `getElementsByTagName` has the highest execution rate (26413.68359375 executions per second)
* `querySelectorAll` has a lower execution rate (19582.490234375 executions per second), but still relatively high
* `TreeWalker` has the lowest execution rate (9661.5263671875 executions per second)
However, without knowing the specific use case or requirements of your application, it's difficult to say which method is best for your needs. It's possible that `getElementsByTagName` may be more suitable if you need to retrieve a single element by its tag name, while `querySelectorAll` and `TreeWalker` may be better suited for more complex queries or iterating over multiple elements.
If you have any additional context or information about your application's requirements, I'd be happy to try and provide more specific guidance.
Related benchmarks:
TreeWalker vs querySelectorAll vs getElementsByTagName (version: 0)

Comparing performance of: TreeWalker vs querySelectorAll vs getElementsByTagName

Created: 5 years ago by: Registered User

Jump to the latest result

TreeWalker

querySelectorAll

getElementsByTagName

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):
