Run results for: Map vs Object UUID Key/Value

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36 Edg/133.0.0.0

Browser: Chrome 133

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Map

2K/s

Obj

2K/s

View exact numbers

Test name	Executions per second
✓ Map	2,262 Ops/sec
Obj	1,521 Ops/sec

Script Preparation code:

var uuid = crypto.randomUUID();
var i = 0, count = 500, a;
a = crypto.randomUUID();

Tests:

Map
var map = new Map(); map.set(uuid, a); for (i = 0; i < count; i++) { map.set(a, crypto.randomUUID()); a = map.get(a); }
Obj
var obj = {}; obj[uuid] = a; for (i = 0; i < count; i++) { obj[a] = crypto.randomUUID(); a = obj[a]; }