Benchmark: _.isEmpty vs Object.keys.length 222

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[`123${i}`] = 'value' + i;
}

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

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

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark measures the performance of two approaches to check if an object is empty:

1. Using `_.isEmpty()` from the Lodash library
2. Using `Object.keys().length === 0`

**Options Compared**

We have two options being compared: using a built-in JavaScript function (`Object.keys().length`) versus using a third-party library function (`_.isEmpty()`).

**Pros and Cons of Each Approach**

1. **Built-in JavaScript Function (`Object.keys().length`)**:
	* Pros:
		+ Faster execution, as it's a native function
		+ Fewer dependencies, no additional library needed
	* Cons:
		+ May not be as readable or intuitive for developers familiar with Lodash
		+ Can be slower if the object is very large and `Object.keys()` needs to iterate over all properties
2. **Lodash Library Function (`_.isEmpty()`)**:
	* Pros:
		+ More readable and intuitive, especially for developers familiar with Lodash
		+ May be faster in certain cases due to caching or optimization in the library
	* Cons:
		+ Adds an additional dependency, which can increase bundle size and complexity
		+ Can be slower due to the overhead of calling a external function

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for various tasks, including array manipulation, object manipulation, and more. The `_.isEmpty()` function checks if an object has any properties and returns `true` if it's empty.

**Special JS Feature/Syntax**

There isn't any special JavaScript feature or syntax being tested in this benchmark.

**Benchmark Preparation Code**

The script preparation code creates a new object `window.obj` with 100 properties, each named with a unique string identifier (e.g., `'1230'`, `'1231'`, etc.). The value of each property is set to `'value' + i`, where `i` is the index.

**Html Preparation Code**

The HTML preparation code includes a script tag that loads the Lodash library from a CDN. This library is used by the benchmark.

**Other Alternatives**

If you want to measure the performance of other approaches, here are some alternatives:

1. Using `Object.keys()` with a for loop: `for (var i = 0; Object.keys(window.obj).length > 0; i++) { ... }`
2. Using `Array.isArray()` and `Object.prototype.hasOwnProperty`: `if (!Array.isArray(window.obj) && !Object.prototype.hasOwnProperty.call(window.obj, '123')) { ... }`
3. Using a custom implementation without relying on built-in functions or libraries.

Keep in mind that these alternatives may have different performance characteristics, readability, and maintainability compared to the original benchmark.

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4484.7 Safari/537.36 OPR/78.0.4072.0 (Edition developer)

Browser/OS: Opera 78 on Windows

View result in a separate tab

Test name	Executions per second
_.isEmpty	230577.4 Ops/sec
Object.keys().length	279508.1 Ops/sec
Object.values().length	79174.1 Ops/sec

Related benchmarks:

_.isEmpty vs Object.keys.length 222 (version: 0)

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

Created: 3 years ago by: Guest

Jump to the latest result

_.isEmpty

Object.keys().length

Object.values().length

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):