Run results for: ES6 property (get/set) & getter/setter function & direct access to object attribute

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0.1 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Directly set

31.5M/s

Setter function

31.2M/s

ES6 property (set)

30.5M/s

Getter function

13.3M/s

ES6 property (get)

13.2M/s

Directly get

13.2M/s

View exact numbers

Test name	Executions per second
✓ Directly set	31,453,354 Ops/sec
Setter function	31,169,890 Ops/sec
ES6 property (set)	30,482,778 Ops/sec
Getter function	13,297,382 Ops/sec
ES6 property (get)	13,238,096 Ops/sec
Directly get	13,235,338 Ops/sec

Script Preparation code:

class Class {
    constructor () {
        this._val = 1
    }
    get value() { return this._val }
    set value(x) { this._val = x }
    getValue() { return this._val }
    setValue(x) { this.val = x }
}
var cls = new Class()
var wtf

Tests:

ES6 property (get)
wtf = cls.value
Getter function
wtf = cls.getValue()
Directly get
wtf = cls._val
ES6 property (set)
cls.value = 1
Setter function
cls.setValue(1)
Directly set
cls._val = 1