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)	286104544.0 Ops/sec
Public Getter function	285186624.0 Ops/sec
Public Directly get	285589824.0 Ops/sec
Public ES6 property (set)	419358240.0 Ops/sec
Public Setter function	413111968.0 Ops/sec
Public Directly set	423327008.0 Ops/sec
Private ES6 property (get)	285106720.0 Ops/sec
Private Getter function	282881280.0 Ops/sec
Private ES6 property (set)	377930016.0 Ops/sec
Private Setter function	365498816.0 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