Run results for: Set vs Object lookup

Run details:

User agent: Mozilla/5.0 (Android 14; Mobile; rv:130.0) Gecko/130.0 Firefox/130.0

Browser: Firefox Mobile 130

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Object

1166.7M/s

Set

1161.2M/s

View exact numbers

Test name	Executions per second
✓ Object	1,166,710,016 Ops/sec
Set	1,161,168,000 Ops/sec

Script Preparation code:

var set = new Set();
var object = {};
var array = new Array(5000).fill().map((_, i) => i);

for (let i = 0; i < array.length; i++) {
  object[i] = true;
}

for (let i = 0; i < array.length; i++) {
  set.add(i);
}

Tests:

Object
object[40]
Set
set.has(40)