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

Public Directly set

423.3M/s

Public ES6 property (set)

419.4M/s

Public Setter function

413.1M/s

Private ES6 property (set)

377.9M/s

Private Setter function

365.5M/s

Public ES6 property (get)

286.1M/s

Public Directly get

285.6M/s

Public Getter function

285.2M/s

Private ES6 property (get)

285.1M/s

Private Getter function

282.9M/s

View exact numbers

Test name	Executions per second
✓ Public Directly set	423,327,008 Ops/sec
Public ES6 property (set)	419,358,240 Ops/sec
Public Setter function	413,111,968 Ops/sec
Private ES6 property (set)	377,930,016 Ops/sec
Private Setter function	365,498,816 Ops/sec
Public ES6 property (get)	286,104,544 Ops/sec
Public Directly get	285,589,824 Ops/sec
Public Getter function	285,186,624 Ops/sec
Private ES6 property (get)	285,106,720 Ops/sec
Private Getter function	282,881,280 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);