Benchmark: Map iteration + clearing

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]); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
forEach + clear
forEach + delete
for...of + clear
for...of + delete

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

for...of + delete

133.5M/s

forEach + delete

105.7M/s

for...of + clear

44.5M/s

forEach + clear

36.3M/s

View exact numbers

Test name	Executions per second
✓ for...of + delete	133,537,488 Ops/sec
forEach + delete	105,745,880 Ops/sec
for...of + clear	44,519,368 Ops/sec
forEach + clear	36,301,300 Ops/sec

Map iteration + clearing (version: 1)

Comparing performance of: `forEach + clear vs forEach + delete vs for...of + clear vs for...of + delete`

Created: one year ago by: Guest

Go to the latest result

forEach + clear

forEach + delete

for...of + clear

for...of + delete

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Map iteration + clearing (version: 1)

Comparing performance of: forEach + clear vs forEach + delete vs for...of + clear vs for...of + delete

Created: one year ago by: Guest

Go to the latest result

forEach + clear

forEach + delete

for...of + clear

for...of + delete

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `forEach + clear vs forEach + delete vs for...of + clear vs for...of + delete`