Run results for: splice vs reduce- move item to the end

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Android

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
splice	1991380.8 Ops/sec
reduce	694944.8 Ops/sec

Script Preparation code:

var list = [];
for (var i = 0; i < 5; i++) {
  list.push(i);
}
var startIndex = 0;
var endIndex = 4;

Tests:

splice
const result = Array.from(list); const [removed] = result.splice(startIndex, 1); result.splice(endIndex, 0, removed); return result;
reduce
const itemToMove = list[startIndex]; return list.reduce((acc, item, index) => { if (index === startIndex) { return acc; } if (index === endIndex) { return startIndex < endIndex ? [...acc, item, itemToMove] : [...acc, itemToMove, item]; } return [...acc, item]; }, []);