Run results for: get x versus array[0]

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/136.2 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 18

Operating system: iOS 18.3.2

Device Platform: Mobile

Date tested: 24 days ago

Test name	Executions per second
array[0]	76786.6 Ops/sec
set / get	75136.3 Ops/sec

Script Preparation code:

// Setup phase - common for both tests
const size = 10000;
const array = new Array(16).fill(1); // Fill array with ones for consistency

const obj = {
    get x() {
        return array[0];
    },

    set x(value) {
        array[0] = value;
    }
};

​x
 
// Setup phase - common for both testsconst size = 10000;const array = new Array(16).fill(1); // Fill array with ones for consistency​const obj = {    get x() {        return array[0];    },​    set x(value) {        array[0] = value;    }};

Tests:

array[0]

let sum = 0;
for (let i = 0; i < size; i++) {
    array[0] = Math.random () * 1000;
    sum += array[0];
}

 
let sum = 0;for (let i = 0; i < size; i++) {    array[0] = Math.random () * 1000;    sum += array[0];}

set / get

let sum = 0;
for (let i = 0; i < size; i++) {
    obj.x = Math.random () * 1000;
    sum += obj.x;
}

 
let sum = 0;for (let i = 0; i < size; i++) {    obj.x = Math.random () * 1000;    sum += obj.x;}