Run results for: JS Array[] vs Map.get()

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/136.0.7103.91 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 136

Operating system: iOS 18.4.1

Device Platform: Mobile

Date tested: one year ago

Map.get

557.8M/s

Array[]

495.7M/s

View exact numbers

Test name	Executions per second
✓ Map.get	557,818,944 Ops/sec
Array[]	495,738,976 Ops/sec

Script Preparation code:

var arr = new Array(2000);
var ms = new Map();
var i = 0;

while (i <= 2000) {
  arr[i] = i;
  ms.set(i, i);
  i++;
}

Tests:

Array[]
const index = arr[1999];
Map.get
ms.get(1999)

Run results for: JS Array[] vs Map.get()

Compare Array[] vs Map.get() for a small amount of data

Array[]

Map.get