Benchmark: Array.from vs Spread Map Performance

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);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.from
Spread and Map

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

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/OS: Chrome 145 on Mac OS X 10.15.7

View result in a separate tab

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

Related benchmarks:

Array.from vs Spread for map values
Array.from vs Spread using Map
Map Array.from vs Spread
Array.from vs Spread with Map
Array.from vs Spread. Map 1000000
Array.from vs Spread of Map
Array.from vs Spread vs For
Array.from vs Spread with mapper func
Array.from vs Spread (Map)

Array.from vs Spread Map Performance (version: 1)

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

Comparing performance of: Array.from vs Spread and Map

Created: 2 months ago by: Guest

Jump to the latest result

Array.from

Spread and Map

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A