Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.164 Safari/537.36
Chrome 91
Windows
Desktop
3 years ago
Test name Executions per second
Array.prototype.concat 4515836.5 Ops/sec
spread operator 23170392.0 Ops/sec
Array.prototype.flat 738573.8 Ops/sec
Tests:
  • Array.prototype.concat

  • spread operator

  • Array.prototype.flat