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 ES6 property (set)

430.8M/s

Public Directly set

425.6M/s

Public Setter function

419.0M/s

Private Setter function

385.0M/s

Private ES6 property (set)

376.6M/s

Public ES6 property (get)

299.6M/s

Private Getter function

287.0M/s

Private ES6 property (get)

286.3M/s

Public Getter function

282.6M/s

Public Directly get

282.5M/s

View exact numbers

Test name	Executions per second
✓ Public ES6 property (set)	430,841,952 Ops/sec
Public Directly set	425,608,800 Ops/sec
Public Setter function	418,993,696 Ops/sec
Private Setter function	385,027,200 Ops/sec
Private ES6 property (set)	376,575,200 Ops/sec
Public ES6 property (get)	299,593,344 Ops/sec
Private Getter function	287,016,160 Ops/sec
Private ES6 property (get)	286,338,688 Ops/sec
Public Getter function	282,615,040 Ops/sec
Public Directly get	282,472,256 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);