Run results for: Array indexOf and splice vs Set delete - good

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

delete set30

19.6M/s

delete set100

19.3M/s

delete set10

18.7M/s

indexOf arr100

9.8M/s

indexOf arr30

9.7M/s

indexOf arr10

9.7M/s

View exact numbers

Test name	Executions per second
✓ delete set30	19,557,008 Ops/sec
delete set100	19,306,702 Ops/sec
delete set10	18,703,900 Ops/sec
indexOf arr100	9,760,472 Ops/sec
indexOf arr30	9,749,085 Ops/sec
indexOf arr10	9,717,645 Ops/sec

Script Preparation code:

function arrayWithLength(length) {
    return Array(length).fill().map((_, i) => i);
}
var arr10 = arrayWithLength(10);
var arr30 = arrayWithLength(30);
var arr100 = arrayWithLength(100);
var set10 = new Set(arr10);
var set30 = new Set(arr30);
var set100 = new Set(arr100);

Tests:

indexOf arr10
const i = arr10.indexOf(9); arr10.splice(i, 1)
delete set10
set10.delete(9);
indexOf arr30
const i = arr30.indexOf(29); arr30.splice(i, 1)
delete set30
set30.delete(29);
indexOf arr100
const i = arr100.indexOf(99); arr100.splice(i, 1)
delete set100
set100.delete(99);