Run results for: Large but empty Array versus Small Object (Access wise with string versus sorted number)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Array	1435230.0 Ops/sec
Object	1441789.2 Ops/sec

Script Preparation code:

var array = [];

for (let i = 0; i < 10; i++)
    array[i] = Math.floor (Math.random () * 10000);

var object = {};

var n0 = 0;
var n1 = 1;
var n2 = 2;
var n3 = 3;
var n4 = 4;
var n5 = 5;
var n6 = 6;
var n7 = 7;
var n8 = 8;
var n9 = 9;

var str0 = "aszfxchJDkdk";
var str1 = "slqmkdjflkjs";
var str2 = "jslkdfJXkfkd";
var str3 = "xnskjdfmjsdj";
var str4 = "xjlkJCLu8_7D";
var str5 = "X?lkdkdxsxsd";
var str6 = "nxJKDFxnJDKF";
var str7 = "LKJClkldjfsv";
var str8 = "LKXJLKDdkfjd";
var str9 = "slkfKLXJdefj";

object[str0] = array[0];
object[str1] = array[1];
object[str2] = array[2];
object[str3] = array[3];
object[str4] = array[4];
object[str5] = array[5];
object[str6] = array[6];
object[str7] = array[7];
object[str8] = array[8];
object[str9] = array[9];

Tests:

Array
let sum = 0; sum += array[n0]; sum += array[n1]; sum += array[n2]; sum += array[n3]; sum += array[n4]; sum += array[n5]; sum += array[n6]; sum += array[n7]; sum += array[n8]; sum += array[n9];
Object
let sum = 0; sum += object[str0]; sum += object[str1]; sum += object[str2]; sum += object[str3]; sum += object[str4]; sum += object[str5]; sum += object[str6]; sum += object[str7]; sum += object[str8]; sum += object[str9];