Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36
Chrome 115
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
Instanceof 6163606.5 Ops/sec
isArray 5983011.5 Ops/sec
variable.constructor 6175144.5 Ops/sec
variable.constructor name 8537536.0 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++; }
  • variable.constructor

     
    if (test.constructor === Array) { c++; }
  • variable.constructor name

     
    if (test.constructor.name === 'Array') { c++; }