Run results for: Array.from() VS Spread

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

spreading (100 elements)

15.5M/s

Array.from (100 elements)

8.7M/s

Array.from (1000 elements)

2.9M/s

spreading (1000 elements)

2.8M/s

spreading (10000 elements)

281K/s

Array.from (10000 elements)

271K/s

View exact numbers

Test name	Executions per second
✓ spreading (100 elements)	15,473,807 Ops/sec
Array.from (100 elements)	8,683,202 Ops/sec
Array.from (1000 elements)	2,871,182 Ops/sec
spreading (1000 elements)	2,824,235 Ops/sec
spreading (10000 elements)	281,213 Ops/sec
Array.from (10000 elements)	270,719 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]