Run results for: t9834yt9h43

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36 Edg/113.0.1774.35

Browser: Chrome 113

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
isArray	703196.0 Ops/sec
instanceof	688872.9 Ops/sec
Object.prototype.toString.call	560452.3 Ops/sec
type	368959.9 Ops/sec

Script Preparation code:

var type = (value) => Object.prototype.toString.call(value).slice(8, -1);

var types = {
  array: [1,2,3],
  number: 123,
  string: '123',
  map: new Map([[1,1],[2,2],[3,3]]),
  set: new Set([1,2,3]),
  buffer: new ArrayBuffer([1,2,3]),
  boolean: true,
  arrow: () => {},
  function: function () {},
  object: {},
  u8: new Uint8Array(),
  u16: new Uint16Array(),
  u32: new Uint32Array(),
  i8: new Int8Array(),
  i16: new Int16Array(),
  i32: new Int32Array()
}

var keys = Object.keys(types)

Tests:

isArray
keys.map(key => Array.isArray(types[key]) === true)
instanceof
keys.map(key => (types[key] instanceof Array) === true)
Object.prototype.toString.call
keys.map(key => Object.prototype.toString.call(types[key]) === '[object Array]')
type
keys.map(key => type(types[key]) === 'Array')

Run results for: t9834yt9h43

isArray

instanceof

Object.prototype.toString.call

type