Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36
Chrome 69
Mac OS X 10.13.6
Desktop
6 years ago
Test name Executions per second
spread operator 6212028.0 Ops/sec
jQuery merge 6224541.0 Ops/sec
Tests:
  • spread operator

    AخA
     
    var a = [ "hello" ]
    var b = [ "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello" ]
    var other = a.concat(b)
  • jQuery merge

     
    var a = [ "hello" ];
    var b = [ "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello" ]
    var other = b.splice(0, 0, a[0]);