Run results for: Rxjs several pipes vs one 100k without functional array functions at all

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
RxJS one pipe	187929.0 Ops/sec
Several pipes	236975.6 Ops/sec

HTML Preparation code:

<script src='https://unpkg.com/rxjs@6.5.5/bundles/rxjs.umd.min.js'></script>

Script Preparation code:

var rawdata = Array.from(Array(100000).keys()) // 10k numbers 1,2,3,4,5...

Tests:

RxJS one pipe
let { from, Observable } = rxjs; let { flatMap, map, tap, toArray } = rxjs.operators; const data$ = from(rawdata) .pipe( map(values => { const finalValues = new Map(); values.forEach(value => { value = value * 2; if (value % 3 === 0) { finalValues.set(value.toString(), value) } }) return finalValues; }) ) let data; data$.subscribe(d => data = d);
Several pipes
let { from, Observable } = rxjs; let { flatMap, map, tap, toArray } = rxjs.operators; const data$ = from(rawdata) .pipe( map(values => values.map(value => value * 2)), map(values => values.filter(value => value % 3 === 0)), map(values => { const finalValues = new Map(); values.forEach(value => finalValues.set(value.toString(), value)); return finalValues; }) ) let data; data$.subscribe(d => data = d);