Run results for: Array isArray vs instanceof vs variable.constructor - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; SM-G981N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.110 Mobile Safari/537.36

Browser: Chrome Mobile 86

Operating system: Android

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
Instanceof	1321890.9 Ops/sec
isArray	1305069.0 Ops/sec
variable.constructor	1329047.2 Ops/sec
variable.constructor name	1861590.6 Ops/sec

Script Preparation code:

var test = [1,2,3,4];
var c;

Tests:

Instanceof
if (test instanceof Array) { c++; }
isArray
if (Array.isArray(test)) { c++; }
variable.constructor
if (test.constructor === Array) { c++; }
variable.constructor name
if (test.constructor.name === 'Array') { c++; }

;