Benchmark: Map vs Object property check

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'); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
obj.hasOwnProperty
map.get
obj.a
map.has

Fastest: N/A

Slowest: N/A

ⓘ Get performance results from real users on your website with Request Metrics.

Website Performance Monitoring by Request Metrics

Latest run results:

Run details: (Test run date: 2 months ago)

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/OS: Chrome 126 on Windows

View result in a separate tab

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

Map vs Object property check (version: 0)

Comparing performance of: obj.hasOwnProperty vs map.get vs obj.a vs map.has

Created: 2 months ago by: Guest

Jump to the latest result

obj.hasOwnProperty

map.get

obj.a

map.has

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A