Benchmark: _.isEmpty vs Object.keys.length

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>

Script Preparation code:

window.obj = {};

for (var i = 0, len = 100; i < len; i++) {
  obj['key' + i] = 'value' + i;
}

Tests:

_.isEmpty
_.isEmpty(window.obj);
Object.keys().length
Object.keys(window.obj).length === 0;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEmpty
Object.keys().length

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 27 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
_.isEmpty	799037.9 Ops/sec
Object.keys().length	848616.3 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what's being tested.

**Benchmark Definition**

The benchmark is comparing two approaches to check if an object is empty:

1. **_.isEmpty(window.obj)**: This uses the Lodash library, which provides a utility function `_.isEmpty()` that checks if a value is "empty" or nullish (i.e., null, undefined, or an empty array). The `window.obj` variable is created with 100 keys and values using a script preparation code.
2. **Object.keys(window.obj).length === 0**: This uses the built-in JavaScript `Object.keys()` method to get an array of the object's own enumerable property names, and then checks if the length of that array is 0.

**Options Compared**

The two options being compared are:

1. Using Lodash's `_.isEmpty()` function
2. Implementing a custom check using `Object.keys()` and a simple comparison

**Pros and Cons**

* **_.isEmpty()**:
	+ Pros: Portable, concise, and efficient (since it's implemented in C).
	+ Cons: Requires the Lodash library to be included, which may add overhead.
* **Custom implementation**:
	+ Pros: No additional dependencies required, potentially faster since it doesn't rely on external libraries.
	+ Cons: May require more code and be less readable.

**Library - Lodash**

The Lodash library is a popular utility function collection for JavaScript. `_.isEmpty()` is one of its many useful functions that provides a quick way to check if a value is empty or nullish.

**Special JS Feature or Syntax**

There doesn't appear to be any special JavaScript features or syntax used in this benchmark.

**Other Considerations**

When writing benchmarks, it's essential to consider the following:

* **Independence**: Ensure that each test case can be executed independently and without affecting the results.
* **Consistency**: Use consistent formatting and naming conventions throughout the benchmark code.
* **Clear goals**: Clearly define what you're trying to measure (e.g., performance, accuracy, or readability).

**Other Alternatives**

If you'd like to explore alternative approaches, consider using:

1. Built-in JavaScript functions: In addition to `Object.keys()`, other built-in methods like `Array.prototype.length` and `Map.prototype.size` could be used.
2. Third-party libraries: Other utility function collections like Moment.js (for date-related tasks) or Immutable.js (for immutable data structures).
3. Benchmarking frameworks: Tools like Benchmark.js, Fastest-Exec-Time (FET), or jsbench can help simplify benchmarking and provide more accurate results.

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

Related benchmarks:

_.isEmpty vs Object.keys.length (version: 0)

Comparing performance of: _.isEmpty vs Object.keys().length

Created: 7 years ago by: Registered User

Jump to the latest result

_.isEmpty

Object.keys().length

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):