Run results for: Map vs Object property check

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
obj.hasOwnProperty	11612.6 Ops/sec
map.get	11641.1 Ops/sec
obj.a	12039.0 Ops/sec
map.has	11551.8 Ops/sec

Script Preparation code:

var map = new Map();
var obj = {};
var i = 0, count = 1000, a;
for (i = 0; i < count; i++) {
	map.set('a', 5);
}
                      
for (i = 0; i < count; i++) {
	obj['a'] = 5;
}

Tests:

obj.hasOwnProperty
for (i = 0; i < count; i++) { a = obj.hasOwnProperty('a'); }
map.get
for (i = 0; i < count; i++) { a = map.get('a'); }
obj.a
for (i = 0; i < count; i++) { a = obj.a; }
map.has
for (i = 0; i < count; i++) { a = map.has('a'); }

Run results for: Map vs Object property check

obj.hasOwnProperty

map.get

obj.a

map.has