Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:80.0) Gecko/20100101 Firefox/80.0
Firefox 80
Mac OS X 10.15
Desktop
4 years ago
Test name Executions per second
Array.isArray 296967328.0 Ops/sec
instanceof 143093632.0 Ops/sec
[].constructor 137809968.0 Ops/sec
Object.prototype.toString 182059680.0 Ops/sec
Script Preparation code:
Tests:
  • Array.isArray

  • instanceof

  • [].constructor

  • Object.prototype.toString