Run results for: JS Map get VS JS Map has

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser: Chrome 137

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 23 days ago

Test name	Executions per second
Map 1	25927.0 Ops/sec
Map 2	26265.1 Ops/sec

Script Preparation code:

var i = 0, count = 1000, a;
var map = new Map();

for (i = 0; i < count; i++) {
  if (Math.random() > 0.5) {
    map.set(i, i * i);
  }
}

​x
 
var i = 0, count = 1000, a;var map = new Map();​for (i = 0; i < count; i++) {  if (Math.random() > 0.5) {    map.set(i, i * i);  }}​​

Tests:

for (i = 0; i < count; i++) {
  map.get(i);
}

 
for (i = 0; i < count; i++) {  map.get(i);}

for (i = 0; i < count; i++) {
  map.has(i);
}

 
for (i = 0; i < count; i++) {  map.has(i);}