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

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.4.1

Device Platform: Mobile

Date tested: 2 years ago

Setter function

13.5M/s

Directly set

13.5M/s

ES6 property (set)

13.3M/s

Directly get

5.5M/s

ES6 property (get)

5.5M/s

Getter function

5.3M/s

View exact numbers

Test name	Executions per second
✓ Setter function	13,502,724 Ops/sec
Directly set	13,467,989 Ops/sec
ES6 property (set)	13,348,284 Ops/sec
Directly get	5,530,126 Ops/sec
ES6 property (get)	5,464,466 Ops/sec
Getter function	5,283,591 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