Benchmark: isArray plus name

Script Preparation code:

var toStr = Object.prototype.toString
	
function toStrCase(obj){
  return toStr.call(obj) === '[object Array]'
}
function consCase(obj){
  return obj.constructor === Array
}
function instCase(obj){
  return obj instanceof Array
}
function consCaseName(obj){
  return obj.constructor.name === 'Array'
}
var isArray = Array.isArray

Tests:

Array.isArray
isArray([])
instanceof
instCase([])
[].constructor
consCase([])
Object.prototype.toString
toStrCase([])
[].constructor.name
consCaseName([])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.isArray
instanceof
[].constructor
Object.prototype.toString
[].constructor.name

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.67 Safari/537.36

Browser/OS: Chrome 87 on Mac OS X 10.11.6

View result in a separate tab

Test name	Executions per second
Array.isArray	6561377.0 Ops/sec
instanceof	2230753.0 Ops/sec
[].constructor	2243596.0 Ops/sec
Object.prototype.toString	2910358.0 Ops/sec
[].constructor.name	5061854.0 Ops/sec

isArray plus name (version: 0)

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

Comparing performance of: Array.isArray vs instanceof vs [].constructor vs Object.prototype.toString vs [].constructor.name

Created: 3 years ago by: Guest

Jump to the latest result

Array.isArray

instanceof

[].constructor

Object.prototype.toString

[].constructor.name

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A