Run results for: isArray-2

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser: Chrome 116

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Array.isArray	14625868.0 Ops/sec
instanceof	4533766.5 Ops/sec
[].constructor	4570952.5 Ops/sec
Object.prototype.toString	6806535.5 Ops/sec
bool	7540469.0 Ops/sec

Script Preparation code:

var toStr = Object.prototype.toString
	
function toStrCase(obj){
  return toStr.call(obj) === '[object Array]'
}
function consCase(obj){
  return obj && obj.constructor === Array
}
function instCase(obj){
  return obj && obj instanceof Array
}
function boolCase(){
  return yes === true;
}
var yes = true;
var isArray = Array.isArray

Tests:

Array.isArray
isArray([])
instanceof
instCase([])
[].constructor
consCase([])
Object.prototype.toString
toStrCase([])
bool
boolCase()

Array.isArray vs Object.prototype.toString vs [].constructor vs instanceof vs bool

Array.isArray

instanceof

[].constructor

Object.prototype.toString

bool