Run results for: Map iteration + clearing

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.1.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.1.1

Device Platform: Mobile

Date tested: one year ago

forEach + delete

61.8M/s

for...of + delete

61.5M/s

forEach + clear

18.3M/s

for...of + clear

17.2M/s

View exact numbers

Test name	Executions per second
✓ forEach + delete	61,795,712 Ops/sec
for...of + delete	61,492,380 Ops/sec
forEach + clear	18,258,548 Ops/sec
for...of + clear	17,154,948 Ops/sec

HTML Preparation code:

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

Script Preparation code:

var myMap = new Map();
for (let i = 0; i < 200; i++) {
  const key = {};
  const value = {value: Math.random()};
  myMap.set(key, value);
}

Tests:

forEach + clear
myMap.forEach((value, key) => { console.log(value, key); }); myMap.clear();
forEach + delete
myMap.forEach((value, key) => { console.log(value, key); myMap.delete(key); });
for...of + clear
for (const entry of myMap) { console.log(entry[1], entry[0]); } myMap.clear();
for...of + delete
for (const entry of myMap) { console.log(entry[1], entry[0]); myMap.delete(entry[0]); }