Run results for: Array.prototype.with() vs Array.prototype.toSpliced() 2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
With	3712.3 Ops/sec
ToSpliced	3740.7 Ops/sec

HTML Preparation code:

<div id="memory">
</div>

Tests:

With
const memBefore = window.performance.memory.usedJSHeapSize; const data = new Array(10000).fill(0); const formatter = Intl.NumberFormat('ru-RU'); const newData = data.with(123, "new value using With()"); const memDiff = window.performance.memory.usedJSHeapSize - memBefore; if(memDiff!==0){ console.log('WITH ',formatter.format(memDiff)); }
ToSpliced
const memBefore = window.performance.memory.usedJSHeapSize; const data = new Array(10000).fill(0); const formatter = Intl.NumberFormat('ru-RU'); const newData = data.toSpliced(123, 1, "new value using With()"); const memDiff = window.performance.memory.usedJSHeapSize - memBefore; if(memDiff!==0){ console.log('TSPL ',formatter.format(memDiff)); }
Splice
const memBefore = window.performance.memory.usedJSHeapSize; const data = new Array(10000).fill(0); const formatter = Intl.NumberFormat('ru-RU'); const newData = [...data].splice(123, 1, "new value using With()"); const memDiff = window.performance.memory.usedJSHeapSize - memBefore; if(memDiff!==0){ console.log('SPLI ',formatter.format(memDiff)); }