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Run results for:
tagName.toLowerCase() vs instanceof
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=605325" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36
Browser:
Chrome 136
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
instanceof
13798491.0 Ops/sec
tagName.toLowerCase()
11444052.0 Ops/sec
nodeName.toLowerCase()
11491501.0 Ops/sec
localName
12162344.0 Ops/sec
__proto__
16341625.0 Ops/sec
Script Preparation code:
var xs = []; var n = 0; for (let i = 0; i < 1000; ++i) { xs[i] = (Math.random() > .5) ? document.createElement(`div`) : document.createElement(`span`); };
Tests:
instanceof
n += ((xs[(Math.random() * 1000)|0]) instanceof HTMLDivElement)|0;
tagName.toLowerCase()
n += (xs[(Math.random() * 1000)|0].tagName.toLowerCase() === `div`)|0;
nodeName.toLowerCase()
n += (xs[(Math.random() * 1000)|0].nodeName.toLowerCase() === `div`)|0;
localName
n += (xs[(Math.random() * 1000)|0].localName === `div`)|0;
__proto__
n += ((xs[(Math.random() * 1000)|0]).__proto__ === HTMLDivElement.prototype)|0;