Run results for: Map get Vs Map has get - V2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.36 Edg/101.0.1210.39

Browser: Chrome 101

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Map 0.9 - get	2734.3 Ops/sec
Map 0.9 - has get	2417.1 Ops/sec
Map 0.5 - get	1926.1 Ops/sec
Map 0.5 - has get	2319.1 Ops/sec
Map 0.1 - get	2143.5 Ops/sec
Map 0.1 - has get	3609.6 Ops/sec

Script Preparation code:

var i = 0, count = 1000, a;
var map09 = new Map();
var map05 = new Map();
var map01 = new Map();

for (i = 0; i < count; i++) {
  if (Math.random() < 0.9) {
    map09.set(i, i * i);
  }
  
  if (Math.random() < 0.5) {
    map05.set(i, i * i);
  }
  
  if (Math.random() < 0.1) {
    map01.set(i, i * i);
  }
}

Tests:

Map 0.9 - get
for (i = 0; i < count; i++) { a = map09.get(i); }
Map 0.9 - has get
for (i = 0; i < count; i++) { if (map09.has(i)) { a = map09.get(i); } }
Map 0.5 - get
for (i = 0; i < count; i++) { a = map05.get(i); }
Map 0.5 - has get
for (i = 0; i < count; i++) { if (map05.has(i)) { a = map05.get(i); } }
Map 0.1 - get
for (i = 0; i < count; i++) { a = map01.get(i); }
Map 0.1 - has get
for (i = 0; i < count; i++) { if (map01.has(i)) { a = map01.get(i); } }

Run results for: Map get Vs Map has get - V2

Map 0.9 - get

Map 0.9 - has get

Map 0.5 - get

Map 0.5 - has get

Map 0.1 - get

Map 0.1 - has get