Benchmark: InstanceOf vs String type vs Symbol

HTML Preparation code:

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

Script Preparation code:

var obj = new TestClass();

Tests:

instanceof
obj instanceof TestClass;
string type
obj.t === 'mesh'
string type + undefined
obj.t !== undefined
property
obj.a !== undefined
symbol
obj.s === S

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
instanceof
string type
string type + undefined
property
symbol

Fastest: N/A

Slowest: N/A

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Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.3 Safari/605.1.15

Browser/OS: Safari 15 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
instanceof	5026851.0 Ops/sec
string type	12037120.0 Ops/sec
string type + undefined	3695302.0 Ops/sec
property	3754270.0 Ops/sec
symbol	3929437.0 Ops/sec

InstanceOf vs String type vs Symbol (version: 0)

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

Comparing performance of: instanceof vs string type vs string type + undefined vs property vs symbol

Created: 2 years ago by: Guest

Jump to the latest result

instanceof

string type

string type + undefined

property

symbol

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A