Run results for: instanceof vs string

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Safari/537.36 OPR/89.0.4447.64 (Edition GX-CN)

Browser: Opera 89

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
instanceof	5453667.0 Ops/sec
string type	14083800.0 Ops/sec

HTML Preparation code:

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

Script Preparation code:

var obj = new TestClass();

Tests:

instanceof
obj instanceof TestClass;
string type
obj.t === 'mesh'

Run results for: instanceof vs string

Measure the performance of instanceOf operator vs comparing a basic string type.

instanceof

string type