Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.87 Safari/537.36
Chrome 78
Mac OS X 10.15.0
Desktop
5 years ago
Test name Executions per second
Array.prototype.concat 4766838.0 Ops/sec
spread operator 19188748.0 Ops/sec
Array.prototype.flat 796315.1 Ops/sec
Tests:
  • Array.prototype.concat

  • spread operator

  • Array.prototype.flat