Run results for: Object.fromEntries vs reduce (clean)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser: Chrome 124

Operating system: Windows

Device Platform: Desktop

Date tested: 5 months ago

Test name	Executions per second
Object.fromEntries	3641260.0 Ops/sec
Reduce (reuse object)	14815.0 Ops/sec
Reduce (Object to Map)	6630.0 Ops/sec
Reduce (Object to Set)	7171.2 Ops/sec
Init (Object to Map)	3222249.0 Ops/sec
Init Set (from array using `Object.values`)	8638.8 Ops/sec
Init Set (from array)	9916.1 Ops/sec
From Object to Map to Object	2353005.0 Ops/sec

Script Preparation code:

var items = [...Array(10000)]
var data = { ...items.keys() }

Tests:

Object.fromEntries
Object.fromEntries(Object.entries(data))
Reduce (reuse object)
items.reduce((acc, value) => { acc[value] = value return acc }, {})
Reduce (array to Map)
items.reduce((result, next) => result.set(next, next), new Map)
Reduce (array to Set)
items.reduce((result, next) => result.add(next), new Set)
Init (Object to Map)
new Map(Object.entries(data))
Init Set (from array using `Object.values`)
new Set(Object.entries(items))
Init Set (from array)
new Set(items)
From Object to Map to Object
Object.fromEntries(new Map(Object.entries(data)))