Benchmark: Benchmark javascript Object vs Map

Script Preparation code:

var size = 1000
var map = new Map()
var object = {}

var emptyMap = new Map()
var emptyObject = {}

for (var i = 0; i < size; i++) {
    map.set(i, i)
    object[i] = i
}

Tests:

Object Write
for (var i=0; i<size; i++) { emptyObject[i] = i }
Map Write
for (var i=0; i<size; i++) { emptyMap.set(i,i) }
Object Read
for (var key in object) { a = object[key] }
Map Read
for (var [key, value] of map) { a = map.get(key) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object Write
Map Write
Object Read
Map Read

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.7 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 18 on iOS 18.7.1

View result in a separate tab

Object Write

1.5M/s

Map Write

120K/s

Object Read

13K/s

Map Read

9K/s

View exact numbers

Test name	Executions per second
✓ Object Write	1,501,797 Ops/sec
Map Write	120,117 Ops/sec
Object Read	13,355 Ops/sec
Map Read	9,086 Ops/sec

Benchmark javascript Object vs Map (version: 2) Benchmark.js

Benchmark javascript Object vs Map

Comparing performance of: `Object Write vs Map Write vs Object Read vs Map Read`

Created: 4 years ago by: Registered User

Go to the latest result

Object Write

Map Write

Object Read

Map Read

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Benchmark javascript Object vs Map (version: 2) Benchmark.js

Benchmark javascript Object vs Map

Comparing performance of: Object Write vs Map Write vs Object Read vs Map Read

Created: 4 years ago by: Registered User

Go to the latest result

Object Write

Map Write

Object Read

Map Read

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `Object Write vs Map Write vs Object Read vs Map Read`