hasOwnProperty vs in

Benchmark created on December 19, 2023

Description

Setup

const noProto = { a: 'a', b: 1};

const noProtoLarger = {
	a: 'a',
	b: 1,
	c: 'hello',
	d: false,
	e: 'no brainer',
	f: {g: 'go'}
};


function CreateProto() {
	this.a = 'a';
}


CreateProto.prototype.b = 1;

const p = new CreateProto();

Test runner

const r = noProto.hasOwnProperty('a');

const r = noProtoLarger.hasOwnProperty('a');

const r = p.hasOwnProperty('a');

const r = p.hasOwnProperty('b');

const r = noProto.hasOwnProperty('b');

const r = noProtoLarger.hasOwnProperty('b');

const r = 'b' in noProto;

const r = 'b' in noProtoLarger;

const r = 'b' in p;

const r = 'a' in p;

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

• Revision 1: published on December 19, 2023