Run results for: Data Properties vs. Accessor Properties vs. Getter / Setter Methods v3

The purpose of this benchmark is to determine the performance differences between data properties, accessor properties and getters / setter functions.

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 128

Operating system: Android

Device Platform: Mobile

Date tested: 3 months ago

Test name	Executions per second
Read from data property	12487470.0 Ops/sec
Write to data property	12569596.0 Ops/sec
Read from accessor method	12601667.0 Ops/sec
Write to mutator method	3229997.2 Ops/sec
Read from object literal property	10146281.0 Ops/sec
Write to object literal property	2252078.5 Ops/sec
Read from object literal property on prototype	12223159.0 Ops/sec
Write to object literal property on prototype	3160515.5 Ops/sec

Script Preparation code:

const foo = 5


var data = {
  property: foo
};



var method = {
  getProperty: function() {
    return foo;
  },

  setProperty: function(value) {
    property = value;
  }
};

var objectLiteralAccessor = {
  get property() {
    return foo;
  },
  set property(value) {
    property = value;
  }
};

function Class() {
}

Class.prototype = {
  get property() {
    return foo;
  },
  set property(value) {
    property = value;
  }
};
    
var prototypeAccessor = new Class();

Tests:

Read from data property
var value = data.property;
Write to data property
data.property = true;
Read from accessor method
var value = method.getProperty();
Write to mutator method
method.setProperty(true);
Read from object literal property
var value = objectLiteralAccessor.property;
Write to object literal property
objectLiteralAccessor.property = true;
Read from object literal property on prototype
var value = prototypeAccessor.property;
Write to object literal property on prototype
prototypeAccessor.property = true;

Run results for: Data Properties vs. Accessor Properties vs. Getter / Setter Methods v3

The purpose of this benchmark is to determine the performance differences between data properties, accessor properties and getters / setter functions.

Read from data property

Write to data property

Read from accessor method

Write to mutator method

Read from object literal property

Write to object literal property

Read from object literal property on prototype

Write to object literal property on prototype