Run results for: Map vs Object - in loop + data retrieval

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36

Browser: Chrome 97

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Map.set in loop + Map.get retrieval	2.0 Ops/sec
Object key:value assignment in loop + retrieval with key	13.8 Ops/sec

Tests:

Map.set in loop + Map.get retrieval
const mapA = new Map() const mapB = new Map() const n = Array(1000000).fill(0) n.forEach((value, index) => { mapA.set(index, index); mapB.set(index, index); }) mapA.get(2)
Object key:value assignment in loop + retrieval with key
const objA = {} const objB = {} const n = Array(1000000).fill(0) const targetIndex = 100 let id = null n.forEach((value, index) => { if(targetIndex === index) { id = index } objA[index]= index objB[index]= index }) objA[id]