Run results for: foreach vs spread operator 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0

Browser: Firefox 89

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
forEach	2466808.0 Ops/sec
spread operator	1201894.0 Ops/sec

Tests:

forEach
var a = {'1': 1, '2': 2, '3': 3, '4': 4} var b = [{id: 5}, {id: 6}, {id: 7}, {id: 8}] b.forEach(x => { a[x.id] = x })
spread operator
var a = {'1': 1, '2': 2, '3': 3, '4': 4} var b = [{id: 5}, {id: 6}, {id: 7}, {id: 8}] a = {...a, ...b.reduce((obj, item) => { obj[item.id]; return obj }, {})}