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

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20120101 Firefox/33.0

Browser: Firefox 33

Operating system: Windows 7

Device Platform: Desktop

Date tested: 6 months ago

Test name	Executions per second
ES6 property (get)	10120950.0 Ops/sec
Getter function	10118940.0 Ops/sec
Directly get	10112980.0 Ops/sec
ES6 property (set)	23380100.0 Ops/sec
Setter function	23696240.0 Ops/sec
Directly set	23622200.0 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

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

ES6 property (get)

Getter function

Directly get

ES6 property (set)

Setter function

Directly set