Run results for: Map vs Object - string keys - write performance

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36

Browser: Chrome 92

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Write to map	113712.2 Ops/sec
Write to obj	110391.1 Ops/sec

Script Preparation code:

window.myObj = {};
window.myMap = new Map();
window.generateId = () => new Date().toISOString() + '=' + Math.random();
window.generateObj = () => ({
    'a': generateId(),
    'b': generateId(),
    'c': generateId()
});

Tests:

Write to map
myMap.set(generateId(), generateObj());
Write to obj
myObj[generateId()] = generateObj();

Run results for: Map vs Object - string keys - write performance

Write to map

Write to obj