Run results for: Object assign vs spread

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Safari/537.36

Browser: Chrome 84

Operating system: Mac OS X 10.15.5

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

const item1 = { a:1, b:2 };
const item2 = { c:3, d:4 };

Tests:

Spread
const item1 = { a:1, b:2 }; const item2 = { c:3, d:4 }; const item3 = { ...item1, ...item2 };
Assign merge
const item1 = { a:1, b:2 }; const item2 = { c:3, d:4 }; const item3 = Object.assign(item1, item2);
Assign create
const item1 = { a:1, b:2 }; const item2 = { c:3, d:4 }; const item3 = Object.assign({}, item1, item2);