Run results for: Array filter vs Set delete

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Filter set10

16.4M/s

Filter set1000000

16.1M/s

Filter set1000

16.0M/s

Filter arr10

13.6M/s

Filter arr1000

964K/s

Filter arr1000000

144/s

View exact numbers

Test name	Executions per second
✓ Filter set10	16,383,250 Ops/sec
Filter set1000000	16,103,573 Ops/sec
Filter set1000	15,983,527 Ops/sec
Filter arr10	13,634,165 Ops/sec
Filter arr1000	963,511 Ops/sec
Filter arr1000000	144 Ops/sec

Script Preparation code:

function arrayWithLength(length) {
    return Array(length).fill().map((_, i) => i);
}
var arr10 = arrayWithLength(10);
var arr1000 = arrayWithLength(1000);
var arr1000000 = arrayWithLength(1000000);
var set10 = new Set(arr10);
var set1000 = new Set(arr1000);
var set1000000 = new Set(arr1000000);

Tests:

Filter arr10
arr10.filter(i => i === 5);
Filter set10
set10.delete(5);
Filter arr1000
arr1000.filter(i => i === 500);
Filter set1000
set1000.delete(500);
Filter arr1000000
arr1000000.filter(i => i === 500000);
Filter set1000000
set1000000.delete(500000);