Run results for: Array.from() VS Spread

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

spreading (100 elements)

13.1M/s

Array.from (100 elements)

6.5M/s

spreading (1000 elements)

3.8M/s

Array.from (1000 elements)

2.9M/s

spreading (10000 elements)

566K/s

Array.from (10000 elements)

557K/s

View exact numbers

Test name	Executions per second
✓ spreading (100 elements)	13,146,886 Ops/sec
Array.from (100 elements)	6,528,417 Ops/sec
spreading (1000 elements)	3,790,140 Ops/sec
Array.from (1000 elements)	2,918,783 Ops/sec
spreading (10000 elements)	566,108 Ops/sec
Array.from (10000 elements)	556,984 Ops/sec

Script Preparation code:

var arr100   = new Array(100).fill(0).map((x) => Math.random())
var arr1000  = new Array(1000).fill(0).map((x) => Math.random())
var arr10000 = new Array(10000).fill(0).map((x) => Math.random())

Tests:

Array.from (100 elements)
const valueFromArray = Array.from(arr100)
spreading (100 elements)
const valueFromSpreading = [...arr100]
Array.from (1000 elements)
const valueFromArray = Array.from(arr1000)
spreading (1000 elements)
const valueFromSpreading = [...arr1000]
Array.from (10000 elements)
const valueFromArray = Array.from(arr10000)
spreading (10000 elements)
const valueFromSpreading = [...arr10000]