Run results for: Object.assign (with/without empty object) vs spread operator

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; Nokia 8 Sirocco) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.90 Mobile Safari/537.36

Browser: Chrome Mobile 73

Operating system: Android

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
Object.assign	1730213.0 Ops/sec
spread operator	970380.4 Ops/sec
Object.assign with empty object to start with	1610576.0 Ops/sec

Tests:

Object.assign
var params = { b:"hello", c: true, d:7 }; var other = Object.assign({ a: 2 }, params);
spread operator
var params = { b:"hello", c: true, d:7 }; var other = { a: 2, ...params };
Object.assign with empty object to start with
var params = { b:"hello", c: true, d:7 }; var other = Object.assign({}, { a: 2 }, params);