Run results for: TreeWalker vs querySelectorAll

Run details:
User agent: Mozilla/5.0 (Android 10; Mobile; rv:75.0) Gecko/75.0 Firefox/75.0
Browser: Firefox Mobile 75
Operating system: Android
Device Platform: Mobile
Date tested: 4 years ago
Test name	Executions per second
TreeWalker	126778.4 Ops/sec
querySelectorAll	295536.9 Ops/sec
HTML Preparation code:
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<article>
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<article>
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<article>
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<article>
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<article>
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<article>
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</article>
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<article>
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</article>
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<article>
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<article>
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<article>
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<article>
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<article>
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<article>
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<article>
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<article>
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</article>
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<article>
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<article>
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</article>
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<article>
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<article>
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<article>
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<article>
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<article>
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<article>
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<article>
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<article>
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<article>
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</article>
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<article>
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<article>
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</article>
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<article>
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</article>
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<article>
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<article>
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<article>
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</article>
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<article>
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</article>
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<article>
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<article>
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<article>
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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.hasAttribute('data-is-title')) { titles.push(title.textContent); } }
querySelectorAll
const titles = []; const elements = document .body .querySelectorAll('[data-is-title]'); for (let i = 0, title; (title = elements[i]); i += 1) { titles.push(title.textContent); }