Run results for: nodeType vs instanceof

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/126.0.6478.35 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 126

Operating system: iOS 17.5

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
nodeType	5706697.0 Ops/sec
instanceof	5758213.5 Ops/sec
nodeType literal	7950768.5 Ops/sec

Script Preparation code:

var xs = [];
var n = 0;

for (let i = 0; i < 1000; ++i) {
  xs[i] = (Math.random() > .5) ? document.createElement(`a`) : document.createTextNode(``);
};

Tests:

nodeType
n += (xs[(Math.random() * 1000)|0].nodeType === Node.ELEMENT_NODE)|0;
instanceof
n += ((xs[(Math.random() * 1000)|0]) instanceof HTMLElement)|0;
nodeType literal
n += (xs[(Math.random() * 1000)|0].nodeType === 1)|0;

Run results for: nodeType vs instanceof

nodeType

instanceof

nodeType literal