Run results for: Map.delete(key) VS Map.set(key, null)

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:100.0) Gecko/20100101 Firefox/100.0

Browser: Firefox 100

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Map.delete(key)	22506002.0 Ops/sec
Map.set(key, null)	23235830.0 Ops/sec

Script Preparation code:

var map = new Map();
for (let i = 0; i < 1000; i++) {
    map.set(i, {});
}

AخA
 
var map = new Map();for (let i = 0; i < 1000; i++) {    map.set(i, {});}

Tests:

Map.delete(key)
for(const key of map.keys()) { map.delete(key); }
for(const key of map.keys()) {
map.delete(key);
}
Map.set(key, null)
for(const key of map.keys()) { map.set(key, null); }
for(const key of map.keys()) {
map.set(key, null);
}