Run results for: is type array

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser: Chrome 69

Operating system: Mac OS X 10.14.0

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
instanceof	390494.7 Ops/sec
constructor ===	288953.6 Ops/sec
instanceof === true	365598.8 Ops/sec

Script Preparation code:

window.a = []
window.b = [1,2,3,4,5,6,7,8,9,10]
window.c = ['asdfasdf','2,3,4,5,6,7,8,9,10','asdfasf','adsfasdf','adfasdfdasf','adsfasdfas','asdfasfasdfasdfasdfasdfasdfasdfsadf']
window.d = null
window.e = undefined
window.f = 'adsfasdfasdf'
window.g = window
window.h = {123:123}

Tests:

instanceof
(function() { var bool if (a instanceof Array) bool = true if (b instanceof Array) bool = true if (c instanceof Array) bool = true if (d instanceof Array) bool = true if (e instanceof Array) bool = true if (f instanceof Array) bool = true if (g instanceof Array) bool = true if (h instanceof Array) bool = true })()
constructor ===
(function() { var bool if ((bool = a && a.constructor === Array) === true) bool = true if ((bool = b && b.constructor === Array) === true) bool = true if ((bool = c && c.constructor === Array) === true) bool = true if ((bool = d && d.constructor === Array) === true) bool = true if ((bool = e && e.constructor === Array) === true) bool = true if ((bool = f && f.constructor === Array) === true) bool = true if ((bool = g && g.constructor === Array) === true) bool = true if ((bool = h && h.constructor === Array) === true) bool = true })()
instanceof === true
(function() { var bool if ((a instanceof Array) === true) bool = true if ((b instanceof Array) === true) bool = true if ((c instanceof Array) === true) bool = true if ((d instanceof Array) === true) bool = true if ((e instanceof Array) === true) bool = true if ((f instanceof Array) === true) bool = true if ((g instanceof Array) === true) bool = true if ((h instanceof Array) === true) bool = true })()

Run results for: is type array

instanceof

constructor ===

instanceof === true