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)	284940160.0 Ops/sec
Public Getter function	284395328.0 Ops/sec
Public Directly get	284728064.0 Ops/sec
Public ES6 property (set)	432408704.0 Ops/sec
Public Setter function	420305984.0 Ops/sec
Public Directly set	425870592.0 Ops/sec
Private ES6 property (get)	286731648.0 Ops/sec
Private Getter function	286688832.0 Ops/sec
Private ES6 property (set)	379407552.0 Ops/sec
Private Setter function	378295840.0 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