Run results for: isEmpty vs .length benchmark

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/110.0

Browser: Firefox 110

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
isEmpty empty array	1377371.2 Ops/sec
.length empty array	2406901.2 Ops/sec
isEmpty string array	1178247.9 Ops/sec
.length string array	2392108.0 Ops/sec
isEmpty object array	1231955.9 Ops/sec
.length object array	2434798.0 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/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 string array
_.isEmpty(window.foo2);
.length string array
window.foo2.length === 0;
isEmpty object array
_.isEmpty(window.foo3);
.length object array
window.foo3.length === 0;

Run results for: isEmpty vs .length benchmark

isEmpty empty array vs length empty array vs isEmpty array of strings vs length array of strings vs isEmpty array of objects vs length array of objects

isEmpty empty array

.length empty array

isEmpty string array

.length string array

isEmpty object array

.length object array