Run details:
Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36
Chrome 90
Fedora
Desktop
3 years ago
Test name Executions per second
Instanceof 2266632.5 Ops/sec
isArray 2278947.2 Ops/sec
Script Preparation code:
AخA
 
var test = [1,2,3,4];
var c;
Tests:
  • Instanceof

     
    if (test instanceof Array) { c++; }
  • isArray

     
    if (Array.isArray(test)) { c++; }