Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36
Chrome 86
Mac OS X 10.15.7
Desktop
4 years ago
Test name Executions per second
concat() + spread operator 5238379.0 Ops/sec
Array.flat() 759545.0 Ops/sec
Tests:
  • concat() + spread operator

  • Array.flat()