Run results for: Small but maybe empty Array versus Small Object (Access wise)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser: Chrome 114

Operating system: Windows

Device Platform: Desktop

Date tested: 11 months ago

Test name	Executions per second
Array	434400.3 Ops/sec
Object	434865.6 Ops/sec

Script Preparation code:

var indexes = [];
var array = [];
var object = {};
for (let i = 0; i < 10; i++) {
    const index = Math.floor (Math.random () * 10);
    array[index] = 1;
    object[index] = 1;
    indexes.push (index);
}

Tests:

Array
let sum = 0; for (let i = indexes.length - 1 ; i >= 0 ; i--) { const index = indexes[i]; sum += array[index]; }
Object
let sum = 0; for (let i = indexes.length - 1 ; i >= 0 ; i--) { const index = indexes[i]; sum += object[index]; }