Run details:
Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36
Chrome 87
Windows 8.1
Desktop
4 years ago
Test name Executions per second
Array.prototype.concat 5380909.5 Ops/sec
spread operator 32277830.0 Ops/sec
Array.prototype.flat 730346.4 Ops/sec
Tests:
  • Array.prototype.concat

  • spread operator

  • Array.prototype.flat