Run results for: tagName vs nodeName

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36 Edg/139.0.0.0

Browser: Chrome 139

Operating system: Windows

Device Platform: Desktop

Date tested: 8 months ago

Test name	Executions per second
tagName	14486.5 Ops/sec
nodeName	14565.7 Ops/sec

Script Preparation code:

var tags = Array.from({
    length: 100
}, () => ["div", "span", "abbr", "table", "div", "main", "section", "aside", "span", "p", "h2", "h3", "p", "div"]).flat();
tags.splice(987, 0, "unknown");
var els = tags.map((tag) => document.createElement(tag));

Tests:

tagName
for (const el of els) { if (el.tagName === "unknown") { break; } }
nodeName
for (const el of els) { if (el.nodeName === "unknown") { break; } }