Run results for: _.isEmpty() vs null check undefined check and Object.keys

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:100.0) Gecko/20100101 Firefox/100.0

Browser: Firefox 100

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Object.keys	694290.5 Ops/sec
_.isEmpty	1217336.6 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>

Script Preparation code:

window.a = {};
window.b = null;
window.c = undefined;
window.d = { a: 1 };
window.e = { a: { b: 1 } };

Tests:

Object.keys
function func(val) { return val == null || (typeof val == 'object' && Object.keys(val) == 0) } func(window.a); func(window.b); func(window.c); func(window.d); func(window.e);
_.isEmpty
function func(val) { return _.isEmpty(val); } func(window.a); func(window.b); func(window.c); func(window.d); func(window.e);