Run results for: ES6 property (get/set) & getter/setter function vs direct access to object attribute (private and not)

Run details:

User agent: Mozilla/5.0 (Android 13; Mobile; rv:125.0) Gecko/125.0 Firefox/125.0

Browser: Firefox Mobile 125

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Public ES6 property (get)	299593344.0 Ops/sec
Public Getter function	282615040.0 Ops/sec
Public Directly get	282472256.0 Ops/sec
Public ES6 property (set)	430841952.0 Ops/sec
Public Setter function	418993696.0 Ops/sec
Public Directly set	425608800.0 Ops/sec
Private ES6 property (get)	286338688.0 Ops/sec
Private Getter function	287016160.0 Ops/sec
Private ES6 property (set)	376575200.0 Ops/sec
Private Setter function	385027200.0 Ops/sec

Script Preparation code:

class Private {
    #value = 0;
    constructor() {
        this.#value = 1
    }
    get value() {
        return this.#value
    }
    set value(x) {
        this.#value = x
    }
    getValue() {
        return this.#value
    }
    setValue(x) {
        this.#value = x
    }
}
class Public {
    value = 0;
    constructor() {
        this.value = 1
    }
    get value() {
        return this.value
    }
    set value(x) {
        this.value = x
    }
    getValue() {
        return this.value
    }
    setValue(x) {
        this.value = x
    }
}
var private = new Private();
var public = new Public();
var val = 0;

Tests:

Public ES6 property (get)
val = public.value;
Public Getter function
val = public.getValue();
Public Directly get
val = public.value;
Public ES6 property (set)
public.value = 1;
Public Setter function
public.setValue(1);
Public Directly set
public.value = 1;
Private ES6 property (get)
val = private.value;
Private Getter function
val = private.getValue();
Private ES6 property (set)
private.value = 1;
Private Setter function
private.setValue(1);

Run results for: ES6 property (get/set) & getter/setter function vs direct access to object attribute (private and not)

Public ES6 property (get)

Public Getter function

Public Directly get

Public ES6 property (set)

Public Setter function

Public Directly set

Private ES6 property (get)

Private Getter function

Private ES6 property (set)

Private Setter function