Run results for: spread v splice

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 14

Operating system: iOS 14.2.1

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
spread	480446.0 Ops/sec
splice	429842.1 Ops/sec

Script Preparation code:

var testArray = [83, 93, 27, 29, 2828, 234, 23, 56, 32, 56, 67, 77, 32, 45, 93, 17, 28, 83, 62, 99, 36, 28, 93, 27, 29, 2828, 234, 23, 56, 32, 56, 67, 77, 32, 45, 93, 17, 28, 83, 62, 99, 36, 28, 93, 27, 29, 2828, 234, 23, 56, 32, 56, 67, 77, 32, 45, 93, 17, 28, 83, 62, 99, 36, 28, 93, 27, 29, 2828, 234, 23, 56, 32, 56, 67, 77, 32, 45, 93, 17, 28, 83, 62, 99, 36, 28, 93, 27, 29, 2828, 234, 23, 56, 32, 56, 67, 77, 32, 45, 93, 17, 28, 83, 62, 99, 36, 28, 93, 27, 29, 2828, 234, 23, 56, 32, 56, 67, 77, 32, 45, 93, 17, 28, 83, 62, 99, 36, 28, 93, 27, 29, 2828, 234, 23, 56, 32, 56, 67, 77, 32, 45, 93, 17, 28, 83, 62, 99, 36, 28, 93, 27, 29, 2828, 234, 23, 56, 32, 56, 67, 77, 32, 45, 93, 17, 28, 83, 62, 99, 36, 28, 93, 27, 29, 2828, 234, 23, 56, 32, 56, 67, 77, 32, 45, 93, 17, 28, 83, 62, 99, 36, 28, 93, 27, 29, 2828, 234, 23, 56, 32, 56, 67, 77, 32, 45, 93, 17, 28, 83, 62, 99, 36, 28];

function getRandomInt(min, max) {
    min = Math.ceil(min);
    max = Math.floor(max);
    return Math.floor(Math.random() * (max - min) + min); //The maximum is exclusive and the minimum is inclusive
}

Tests:

spread
const indexToRemove = getRandomInt(0, testArray.length) const newArr = [ ...testArray.slice(0, indexToRemove), ...testArray.slice(indexToRemove + 1) ]
splice
const indexToRemove = getRandomInt(0, testArray.length) const arrCopy = [...testArray] arrCopy.splice(indexToRemove, 1)

Run results for: spread v splice

remove single index

spread

splice