Run results for: Compare lodash isEmpty and length comparison on arrays

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:90.0) Gecko/20100101 Firefox/90.0

Browser: Firefox 90

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
isEmpty empty array	4191928.0 Ops/sec
length empty array	6564072.0 Ops/sec
isEmpty array of strings	4118371.0 Ops/sec
length array of strings	6607432.0 Ops/sec
isEmpty array of objects	4288871.0 Ops/sec
length array of objects	7205977.0 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 empty array
_.isEmpty(window.foo1);
length empty array
window.foo1.length === 0;
isEmpty array of strings
_.isEmpty(window.foo2);
length array of strings
window.foo2.length === 0;
isEmpty array of objects
_.isEmpty(window.foo3);
length array of objects
window.foo3.length === 0;

Run results for: Compare lodash isEmpty and length comparison on arrays

isEmpty empty array

length empty array

isEmpty array of strings

length array of strings

isEmpty array of objects

length array of objects