Run results for: Array.from vs Spread Map Performance

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser: Chrome 145

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
Array.from	64.1 Ops/sec
Spread and Map	113.4 Ops/sec

Script Preparation code:

var size = 1000000;                                                                                           
var iterable = new Set(Array.from({ length: size }, (_, i) => i));                                            
var mapper = (x) => x * 2;

Tests:

Array.from
var result = Array.from(iterable, mapper);
Spread and Map
var result = [...iterable].map(mapper);

Run results for: Array.from vs Spread Map Performance

Comparing performance of Array.from(iterable, mapper) vs [...iterable].map(mapper)

Array.from

Spread and Map