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Run results for:
tagName vs instanceof
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=508839" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:123.0) Gecko/20100101 Firefox/123.0
Browser:
Firefox 123
Operating system:
Ubuntu
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
instanceof
5693664.5 Ops/sec
tagName
10679078.0 Ops/sec
nodeName
11723603.0 Ops/sec
localName
10918026.0 Ops/sec
__proto__
12635230.0 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
n += (xs[(Math.random() * 1000)|0].tagName === `DIV`)|0;
nodeName
n += (xs[(Math.random() * 1000)|0].nodeName === `DIV`)|0;
localName
n += (xs[(Math.random() * 1000)|0].localName === `div`)|0;
__proto__
n += ((xs[(Math.random() * 1000)|0]).__proto__ === HTMLDivElement.prototype)|0;