Run results for: Set in reduce vs spread and set later

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; moto g(7) power) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.110 Mobile Safari/537.36

Browser: Chrome Mobile 86

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
Set in reduce	286661.2 Ops/sec
Set after reduce	256792.3 Ops/sec

Tests:

Set in reduce
const permissions = { foo: ['a', 'b', 'c', 'd', 'e'], bar: ['a', 'c', 'd', 'z'], baz: ['a', 'b', 'e', 'z']} const positionsSet = Object.values(permissions).reduce( (result, businessPositions) => { businessPositions.forEach(position => result.add(position)) return result }, new Set(), ) const positions = [...positionsSet]
Set after reduce
const permissions = { foo: ['a', 'b', 'c', 'd', 'e'], bar: ['a', 'c', 'd', 'z'], baz: ['a', 'b', 'e', 'z']} const allPositions = Object.values(permissions).reduce( (result, businessPositions) => [...businessPositions ,...result], [] ) const positions = [...new Set(allPositions)]