Run results for: Map.get vs Object[i] vs Map.has

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.4 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 7 days ago

Test name	Executions per second
Obj get	14151171.0 Ops/sec
Map get	3702161.2 Ops/sec
Map has	3797199.2 Ops/sec

Script Preparation code:

var map = new Map([[1, 1]]);
var obj = {1: 1};
var count = 100; 
var a, i;


for (let j = 0; j < count; j++) {
  map.set(j, j);
  obj[j] = j;
}

Tests:

Obj get
for (i = 0; i < count; i++) { a = obj[i]; }
Map get
for (i = 0; i < count; i++) { a = map.get(i); }
Map has
for (i = 0; i < count; i++) { a = map.has(i) }

Run results for: Map.get vs Object[i] vs Map.has

Obj get

Map get

Map has