Run results for: Array isArray vs typeof vs array || [] - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:147.0) Gecko/20100101 Firefox/147.0

Browser: Firefox 147

Operating system: Windows

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
typeof	477316864.0 Ops/sec
isArray	191657152.0 Ops/sec
array \|\| []	438004864.0 Ops/sec
instanceOf	171381216.0 Ops/sec

Script Preparation code:

var test = [1,2,3,4];
var c;

Tests:

typeof
if (typeof test === 'object') { c++; }
isArray
if (Array.isArray(test)) { c++; }
array || []
if (test || []) { c++; }
instanceOf
if (test instanceof Array) { c++; }