Run results for: public vs closure vs private

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:122.0) Gecko/20100101 Firefox/122.0

Browser: Firefox 122

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

private

220K/s

public

220K/s

closure

140K/s

View exact numbers

Test name	Executions per second
✓ private	220,376 Ops/sec
public	219,691 Ops/sec
closure	139,940 Ops/sec

Script Preparation code:

class PropertyAccess {
  _public = 0;
  #private = 0;
  
  constructor() {
    let closure = 0;
    this.closure_update = function() { closure++; };
  }

  public_update(){ this._public++; }
  private_update(){ this.#private++; }
}

window.__measurethat_property_access = new PropertyAccess();
console.log(__measurethat_property_access);

Tests:

public
const pa = __measurethat_property_access; for (let x = 0; x < 1000; x++) pa.public_update();
closure
const pa = __measurethat_property_access; for (let x = 0; x < 1000; x++) pa.closure_update();
private
const pa = __measurethat_property_access; for (let x = 0; x < 1000; x++) pa.private_update();