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 18_0_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.0.1

Device Platform: Mobile

Date tested: one year ago

ES6 property (set)

13.1M/s

Setter function

12.5M/s

Directly set

12.5M/s

Directly get

5.8M/s

ES6 property (get)

5.8M/s

Getter function

5.7M/s

View exact numbers

Test name	Executions per second
✓ ES6 property (set)	13,066,548 Ops/sec
Setter function	12,532,108 Ops/sec
Directly set	12,520,408 Ops/sec
Directly get	5,823,412 Ops/sec
ES6 property (get)	5,792,430 Ops/sec
Getter function	5,722,298 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