Run results for: Adding new key in object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36

Browser: Chrome 107

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

var data = Object.entries({ ...Array.from(Array(10000).keys()) });

Tests:

reduce with same obj
data.reduce((map, [price, vol]) => { map[price] = vol; return map; }, {});
creating new object
data.reduce((map, [price, vol]) => { return { ...map, [price]: vol, }; }, {});
fromEntries
Object.fromEntries(data);