Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36
Chrome 94
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
Basic object spread 16259080.0 Ops/sec
Basic assign operator 5446201.0 Ops/sec
Assign with empty object 4650612.0 Ops/sec
Tests:
  • Basic object spread

    AخA
     
    const obj = { foo: 1, bar: 2 };
    const finalObject = ({ baz: 3, ...obj })
  • Basic assign operator

     
    const obj = { foo: 1, bar: 2 };
    const finalObject = Object.assign({baz: 3}, obj);
  • Assign with empty object

     
    const obj = { foo: 1, bar: 2 };
    Object.assign({}, obj, { baz: 3 });