Run results for: isEmpty vs .length benchmark

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0

Browser: Firefox 150

Operating system: Linux

Device Platform: Desktop

Date tested: 4 months ago

Benchmark engine: Benchmark.js

.length empty array

8.8M/s

.length string array

8.7M/s

.length object array

8.5M/s

isEmpty empty array

5.2M/s

isEmpty object array

5.1M/s

isEmpty string array

4.9M/s

View exact numbers

Test name	Executions per second
✓ .length empty array	8,811,358 Ops/sec
.length string array	8,658,277 Ops/sec
.length object array	8,499,527 Ops/sec
isEmpty empty array	5,200,296 Ops/sec
isEmpty object array	5,139,824 Ops/sec
isEmpty string array	4,914,552 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;