Run results for: Array spread operator vs push, large list

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:147.0) Gecko/20100101 Firefox/147.0

Browser: Firefox 147

Operating system: Windows

Device Platform: Desktop

Date tested: 7 months ago

Benchmark engine: Benchmark.js

push

1.3M/s

spread

23K/s

View exact numbers

Test name	Executions per second
✓ push	1,321,016 Ops/sec
spread	22,987 Ops/sec

Script Preparation code:

window.startArray = [];
for (let i = 0; i < 100; i++) {
  startArray.push("El-" + i);
}

Tests:

spread
startArray.reduce((accumulator, currentValue) => { return [...accumulator, currentValue]; }, []);
push
startArray.reduce((accumulator, currentValue) => { accumulator.push(currentValue); return accumulator; }, []);