Run results for: get x versus array[0]

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
array[0]	10427.7 Ops/sec
set / get	1151.4 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;
    }
};

Tests:

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; }

Run results for: get x versus array[0]

array[0]

set / get