Benchmark: is type array - MeasureThat.net

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 })()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
instanceof
constructor ===
instanceof === true

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 5 years ago)

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/OS: Chrome 69 on Mac OS X 10.14.0

View result in a separate tab

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

is type array (version: 3)

Comparing performance of: instanceof vs constructor === vs instanceof === true

Created: 5 years ago by: Registered User

Jump to the latest result

instanceof

constructor ===

instanceof === true

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A