Run results for: Array filter vs Set delete

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/129.0.6668.69 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 129

Operating system: iOS 17.6

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

Filter set10

30.6M/s

Filter set1000

30.0M/s

Filter set1000000

28.0M/s

Filter arr10

18.5M/s

Filter arr1000

715K/s

Filter arr1000000

382/s

View exact numbers

Test name	Executions per second
✓ Filter set10	30,606,716 Ops/sec
Filter set1000	30,009,722 Ops/sec
Filter set1000000	27,953,156 Ops/sec
Filter arr10	18,546,890 Ops/sec
Filter arr1000	714,659 Ops/sec
Filter arr1000000	382 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);