Run results for: JS Map get VS JS Map has

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0

Browser: Chrome 131

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Map 1

14K/s

Map 2

14K/s

View exact numbers

Test name	Executions per second
✓ Map 1	13,917 Ops/sec
Map 2	13,858 Ops/sec

Script Preparation code:

var i = 0, count = 1000, a;
var map = new Map();

for (i = 0; i < count; i++) {
  if (Math.random() > 0.5) {
    map.set(i, i * i);
  }
}

Tests: