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 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Private Setter function

11.3M/s

Public Directly set

11.3M/s

Public Setter function

11.3M/s

Private ES6 property (set)

11.3M/s

Public ES6 property (set)

11.3M/s

Public Directly get

4.8M/s

Private Getter function

4.8M/s

Private ES6 property (get)

4.8M/s

Public Getter function

4.8M/s

Public ES6 property (get)

4.8M/s

View exact numbers

Test name	Executions per second
✓ Private Setter function	11,349,686 Ops/sec
Public Directly set	11,349,275 Ops/sec
Public Setter function	11,306,946 Ops/sec
Private ES6 property (set)	11,284,329 Ops/sec
Public ES6 property (set)	11,259,034 Ops/sec
Public Directly get	4,839,253 Ops/sec
Private Getter function	4,825,800 Ops/sec
Private ES6 property (get)	4,825,546 Ops/sec
Public Getter function	4,814,364 Ops/sec
Public ES6 property (get)	4,787,858 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);