Run results for: JavaScript spread operator vs Slice/Splice performance - 2

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.5 Mobile/15E148 Safari/605.1 NAVER(inapp; search; 1010; 11.13.2; 12PRO)

Browser: Mobile Safari 15

Operating system: iOS 15.5

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Array clone with spread operator	13353390.0 Ops/sec
Array clone with slice	9993485.0 Ops/sec
Array addition with spread operator	6825592.0 Ops/sec
Array addition with slice and push	5172559.0 Ops/sec

Script Preparation code:

const ITERATIONS = 500000;
var index = ITERATIONS/2;
var n = Math.random();

var list = [];
for (let i = 0; i < length; i += 1) {
  list.push(Math.random());
}

Tests:

Array clone with spread operator
const clone = [...list];
Array clone with slice
const clone = list.slice();
Array addition with spread operator
const clone = [...list, n];
Array addition with slice and push
const clone = list.slice(); clone.push(n);

Run results for: JavaScript spread operator vs Slice/Splice performance - 2

Array clone with spread operator

Array clone with slice

Array addition with spread operator

Array addition with slice and push