Run results for: Object.assign-vs-Spread

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36

Browser: Chrome 73

Operating system: Mac OS X 10.14.3

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Object.assign	4369327.0 Ops/sec
spread operator	3998366.0 Ops/sec

Tests:

Object.assign
const acc= {a : [2]}; const newValue = { b: [3]}; Object.assign(acc, newValue); return acc
spread operator
const acc= {a : [2]}; const newValue = { b: [3]}; return { ...acc, ...newValue };