Run results for: isEmpty vs .length benchmark

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser: Chrome 109

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
isEmpty empty array	4941065.0 Ops/sec
.length empty array	9966356.0 Ops/sec
isEmpty string array	4913966.5 Ops/sec
.length string array	10359420.0 Ops/sec
isEmpty object array	4862185.0 Ops/sec
.length object array	10085560.0 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