Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36
Chrome 87
Windows
Desktop
3 years ago
Test name Executions per second
Array.prototype.concat 5894315.5 Ops/sec
spread operator 33907660.0 Ops/sec
Array.prototype.flat 764672.4 Ops/sec
Tests:
  • Array.prototype.concat

  • spread operator

  • Array.prototype.flat