Run results for: Object vs Map MYTEST21372

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

iterate map

33.6M/s

Map

355/s

delete obj

149/s

random data access map

107/s

random obj

82/s

Iteratate object

45/s

View exact numbers

Test name	Executions per second
✓ iterate map	33,611,260 Ops/sec
Map	355 Ops/sec
delete obj	149 Ops/sec
random data access map	107 Ops/sec
random obj	82 Ops/sec
Iteratate object	45 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

/*your preparation JavaScript code goes here
To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/
async function globalMeasureThatScriptPrepareFunction() {
    // This function is optional, feel free to remove it.
    // await someThing();
}

const obj = {};

for (let i = 0; i < 100000; i+=1) {
	obj[`my_key${i}`] = i;
}

let map = new Map();

for (let i = 0; i < 100000; i+=1) {
	map.set(`my_key${i}`, i)
}

Tests:

Map
for (let i = 0; i < 100000; i += 1) { map.delete(`my_key${i}`) }
Iteratate object
Object.entries(obj).map((a, b) => b);
iterate map
map.entries().map(a => b);
random data access map
for (let i = 0; i < 100000; i += 1) { let date = (Date.now() - (i % 100)) % 100000; map.get(`my_key${date}`) }
random obj
for (let i = 0; i < 100000; i += 1) { let date = (Date.now() - (i % 100)) % 100000; obj[`my_key${date}`] }
delete obj
for (let i = 0; i < 100000; i += 1) { delete obj[`my_key${i}`] }