Run results for: nodeType vs instanceof

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3.1 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

nodeType literal

78.7M/s

instanceof

37.1M/s

nodeType

31.5M/s

View exact numbers

Test name	Executions per second
✓ nodeType literal	78,722,712 Ops/sec
instanceof	37,120,268 Ops/sec
nodeType	31,515,934 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;