Run results for: nodeType vs instanceof

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0

Browser: Firefox 90

Operating system: Windows 7

Device Platform: Desktop

Date tested: one year ago

nodeType literal

8.8M/s

nodeType

8.0M/s

instanceof

3.7M/s

View exact numbers

Test name	Executions per second
✓ nodeType literal	8,838,779 Ops/sec
nodeType	8,002,399 Ops/sec
instanceof	3,704,144 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;