Run results for: Instanceof vs string comparison vs property checking vs constructor comparison

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0

Browser: Firefox 121

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 2 years ago

property

822.2M/s

constructor comparison

821.8M/s

string type + undefined

815.5M/s

string type

788.7M/s

instanceof

170.7M/s

View exact numbers

HTML Preparation code:

<script>
class TestClass {
    constructor() {
        this.a = 2;
        this.t = 'mesh';
    }
}
</script>

Script Preparation code:

var obj = new TestClass();

Tests: