Run results for: traverse vs NodeIterator vs TreeWalker vs document.querySelectorAll(*) (fix: querySelectorAll)

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser: Chrome 137

Operating system: Linux

Device Platform: Desktop

Date tested: 11 months ago

Benchmark engine: Benchmark.js

querySelectorAll('*')

1.5M/s

TreeWalker with filter param

857K/s

NodeIterator with filter param

407K/s

Traverse function

220K/s

TreeWalker with filter function

96K/s

NodeIterator with filter function

34K/s

View exact numbers

Test name	Executions per second
✓ querySelectorAll('*')	1,461,423 Ops/sec
TreeWalker with filter param	856,715 Ops/sec
NodeIterator with filter param	406,885 Ops/sec
Traverse function	220,271 Ops/sec
TreeWalker with filter function	95,924 Ops/sec
NodeIterator with filter function	34,117 Ops/sec

Script Preparation code:

// language=HTML
const html = `
    <!-- article out start -->
    <article>
        <!-- article in start -->
        <h1>Lorem ipsum</h1>
        <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Cumque, nostrum.</p>
        <!-- article in end -->
    </article>
    <!-- article out end -->

    <!-- article out start -->
    <article>
        <!-- article in start -->
        <h1>Lorem ipsum</h1>
        <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Cumque, nostrum.</p>
        <!-- article in end -->
    </article>
    <!-- article out end -->

    <!-- article out start -->
    <article>
        <!-- article in start -->
        <h1>Lorem ipsum</h1>
        <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Cumque, nostrum.</p>
        <!-- article in end -->
    </article>
    <!-- article out end -->
`;
const template = document.createElement('template');
template.innerHTML = html;

window.testTemplate = template;

window.testTraverse = function traverse(node, use) {
    if (!node) return;

    use(node);
    traverse(node.firstChild, use);
    traverse(node.nextSibling, use);
}

Tests:

Traverse function
const comments = []; testTraverse(testTemplate.content.firstChild, node => { if (node.nodeType === NodeFilter.SHOW_ALL) { comments.push(node); } });
NodeIterator with filter function
const nodeIterator = document.createNodeIterator( testTemplate.content, NodeFilter.SHOW_ALL, { acceptNode(node) { if (node.nodeType === NodeFilter.SHOW_ALL) { return NodeFilter.FILTER_ACCEPT; } return NodeFilter.FILTER_REJECT; } } ); const comments = []; while (nodeIterator.nextNode()) { comments.push(nodeIterator.currentNode); }
NodeIterator with filter param
const nodeIterator = document.createNodeIterator( testTemplate.content, NodeFilter.SHOW_ALL ); const comments = []; while (nodeIterator.nextNode()) { comments.push(nodeIterator.currentNode); }
TreeWalker with filter function
const treeWalker = document.createTreeWalker( testTemplate.content, NodeFilter.SHOW_ALL, { acceptNode(node) { if (node.nodeType === Node.COMMENT_NODE) { return NodeFilter.FILTER_ACCEPT; } return NodeFilter.FILTER_REJECT; } } ); const comments = []; while (treeWalker.nextNode()) { comments.push(treeWalker.currentNode); }
TreeWalker with filter param
const treeWalker = document.createTreeWalker( testTemplate.content, NodeFilter.SHOW_COMMENT ); const comments = []; while (treeWalker.nextNode()) { comments.push(treeWalker.currentNode); }
querySelectorAll('*')
Array.from(testTemplate.querySelectorAll('*'))