Benchmark: Compare lodash isEmpty and length comparison on arrays

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;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
isEmpty empty array
length empty array
isEmpty array of strings
length array of strings
isEmpty array of objects
length array of objects

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 20 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Windows

View result in a separate tab

Test name	Executions per second
isEmpty empty array	20069574.0 Ops/sec
length empty array	109547888.0 Ops/sec
isEmpty array of strings	15213635.0 Ops/sec
length array of strings	94368904.0 Ops/sec
isEmpty array of objects	15514364.0 Ops/sec
length array of objects	94347120.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):

LLMs can make mistakes. Check important info.

I'll break down the benchmark and explain what's being tested, the pros and cons of each approach, and other considerations.

**Benchmark Definition**

The benchmark is designed to compare two approaches:

1. **_.isEmpty(window.foo1);**
2. **window.foo1.length === 0;**

Both methods are used to check if an empty array `window.foo1` has zero elements.

**Lodash Library**

The Lodash library, specifically the `_.isEmpty()` function, is used in two test cases:

* "isEmpty empty array"
* "isEmpty array of objects"

_._isEmpty() is a utility function that checks if a value is empty. It returns a boolean indicating whether the value is empty or not.

**Native JavaScript**

The native JavaScript `length` property and comparison operator (`===`) are used in three test cases:

* "length empty array"
* "length array of strings"
* "length array of objects"

In these cases, we're checking if the length of an array is zero using the `length` property and the `===` operator.

**Approach Comparison**

Here's a brief summary of each approach:

1. **Lodash `_._isEmpty()`**: This method uses Lodash's internal logic to check for emptiness, which might be more efficient than native JavaScript methods in some cases.
	* Pros: Might be more efficient due to optimized implementation.
	* Cons: Requires including the Lodash library, which may introduce an additional dependency.
2. **Native JavaScript `length` property**: This method uses the built-in `length` property and comparison operator (`===`) to check for emptiness.
	* Pros: No dependencies, widely supported across browsers.
	* Cons: Might be slower or less efficient than Lodash's implementation due to native code overhead.

**Other Considerations**

* **Type coercion**: In some cases (e.g., checking if an empty array has zero elements), JavaScript may perform type coercion, which can affect performance. Lodash's `_._isEmpty()` function might mitigate this issue.
* **Browser support**: While the `length` property and comparison operator are widely supported across browsers, Lodash's implementation may have additional dependencies or requirements (e.g., polyfills) for certain browsers.

**Alternatives**

If you're looking for alternative approaches, consider:

1. **Using a different library**: Other utility libraries like Moment.js, jQuery, or native implementations like `Array.prototype.every()` could be explored.
2. **Writing a custom implementation**: You can write your own implementation using JavaScript's built-in types and operators to check for emptiness.
3. **Using a framework-specific solution**: Some frameworks (e.g., React) provide optimized implementations for checking array emptiness.

Keep in mind that the choice of approach depends on your specific use case, performance requirements, and dependencies.

Related benchmarks:

Compare lodash isEmpty and length comparison on arrays (version: 0)

Comparing performance of: 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

Created: 5 years ago by: Guest

Jump to the latest result

isEmpty empty array

length empty array

isEmpty array of strings

length array of strings

isEmpty array of objects

length array of objects

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):