Run results for: Convert Array to Object - Object.fromEntries vs reduce

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36

Browser: Chrome 100

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Object.fromEntries	7323.4 Ops/sec
Reduce (reuse object)	10282.6 Ops/sec
Reduce (creating temporary objects)	101.3 Ops/sec

Script Preparation code:

var data = Array.from(Array(10000).keys()).map(v => ({id: v, value: `val_${v}`}));

Tests:

Object.fromEntries
Object.fromEntries(data.map(({id, value}) => [id, value]));
Reduce (reuse object)
data.reduce((acc, {id, value}) => { acc[id] = value; return acc; }, {});
Reduce (creating temporary objects)
data.reduce((acc, {id, value}) => ({ ...acc, [id]: value }), {});