Run results for: Map vs Object: Full benchmark

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36

Browser: Chrome 99

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Map Write	5984.6 Ops/sec
Object Write	6287.8 Ops/sec
Map Read	4282.9 Ops/sec
Object Read	4547.1 Ops/sec

Script Preparation code:

var mapWrite = new Map();
var objWrite = {};

var mapRead = new Map();
var objRead = {};

var read = 'a';

mapRead.set(read, read);
objRead[read] = read;

var count = 1000;

Tests:

Map Write
for (i = 0; i < count; i++) { mapWrite.set(i, i); };
Object Write
for (i = 0; i < count; i++) { objWrite[i] = i; };
Map Read
for (i = 0; i < count; i++) { mapRead.get(read); };
Object Read
for (i = 0; i < count; i++) { objRead[read]; };

Run results for: Map vs Object: Full benchmark

Lookup of map vs object

Map Write

Object Write

Map Read

Object Read