Run results for: Property Assignment vs Symbol Assignment in Class Constructor

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.2 Safari/605.1.15

Browser: Safari 13

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Property	4858053.0 Ops/sec
Symbol	5050059.5 Ops/sec

Script Preparation code:

class Propertied {
    constructor() {
        this.key = 1;
    }
}
window.Propertied = Propertied;

const symbol = Symbol("key");
class Symboled {
    constructor() {
        this[symbol] = 1;
    }
}

window.Symboled = Symboled;

​x
 
class Propertied {    constructor() {        this.key = 1;    }}window.Propertied = Propertied;​const symbol = Symbol("key");class Symboled {    constructor() {        this[symbol] = 1;    }}​window.Symboled = Symboled;

Tests:

Property
new Propertied();
new Propertied();
Symbol
new Symboled();
new Symboled();