Tests:
  • Array.prototype.concat

    AخA
     
    const params = { "foo": [], "bar": [], "baz":[] };
    const newObj = Object.assign({}, params);
    newObj.foo = "FOO";
    return newObj;
  • spread operator

     
    const params = { "foo": [], "bar": [], "baz":[] };
    return {...params, foo: "FOO",}
Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

  • Test case name Result
    Array.prototype.concat
    spread operator

    Fastest: N/A

    Slowest: N/A

Latest run results:
Run details: (Test run date: 6 years ago)
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.62 Safari/537.36
Chrome 67 on Mac OS X 10.13.3
View result in a separate tab
Test name Executions per second
Array.prototype.concat 940068.9 Ops/sec
spread operator 1326741.8 Ops/sec