Run results for: filter + join vs for + concat

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:127.0) Gecko/20100101 Firefox/127.0

Browser: Firefox 127

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

for

4.2M/s

filter + join

2.4M/s

View exact numbers

Test name	Executions per second
✓ for	4,221,224 Ops/sec
filter + join	2,410,646 Ops/sec

Script Preparation code:

var arr = ["abc","123","fghfg","fdgfdgfd","dgfdgfdgfd","234344",false,"",undefined,34,"fdgfdg"]

Tests:

filter + join
const result = arr.filter(Boolean).join(" ");
for
let str = ""; for (let i = 0; i < arr.length; i++) { if (Boolean(arr[i])) { str += arr[i] + " "; } }