Run results for: BS test isEmpty

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36

Browser: Chrome 90

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
_.isEmpty(window.foo1);	3247860.0 Ops/sec
Array.isArray(window.foo1) && window.foo1.length === 0	2384964.0 Ops/sec
window.foo1?.length === 0	6457469.0 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

// empty array
window.foo1 = [];

// array of strings
window.foo2 = ['a', 'b', 'c', 'd', 'e'];

// array of objects
window.foo3 = [{ a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }, { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }, { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }];

Tests:

_.isEmpty(window.foo1);
_.isEmpty(window.foo1);
Array.isArray(window.foo1) && window.foo1.length === 0
Array.isArray(window.foo1) && window.foo1.length === 0
window.foo1?.length === 0
window.foo1?.length === 0

Run results for: BS test isEmpty

_.isEmpty(window.foo1);

Array.isArray(window.foo1) && window.foo1.length === 0

window.foo1?.length === 0