Benchmark: _.isEmpty vs Object.keys.length 1

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.11/lodash.min.js"></script>

Script Preparation code:

window.obj = {};

for (var i = 0, len = 5; 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

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

LLMs can make mistakes. Check important info.

Let's dive into the explanation of what is tested on the provided JSON, comparing options, and other considerations.

**Benchmark Definition**

The benchmark defines two test cases:

1. `_.isEmpty(window.obj)`: This test case checks if the Lodash library's `isEmpty` function returns true for an empty object (`window.obj`). The `isEmpty` function is part of the Lodash utility library.
2. `Object.keys(window.obj).length === 0`: This test case checks if the length of the keys array returned by the `Object.keys()` method equals 0 for the same object (`window.obj`). This is a built-in JavaScript feature.

**Options Compared**

In this benchmark, two options are compared:

1. **Lodash's `isEmpty` function**: This function is used to check if an object is empty. The Lodash library provides various utility functions for common tasks.
2. **Built-in `Object.keys()` method with a custom comparison**: Instead of simply checking the length of the keys array returned by `Object.keys()`, this option performs a direct comparison using the `===` operator.

**Pros and Cons**

1. **Lodash's `isEmpty` function**:
	* Pros:
		+ Convenient for checking empty objects
		+ Part of the Lodash utility library, which provides various useful functions
	* Cons:
		+ Adds an external dependency (the Lodash library)
		+ May have performance overhead due to the additional function call
2. **Built-in `Object.keys()` method with a custom comparison**:
	* Pros:
		+ No external dependencies or performance overhead
		+ Uses built-in JavaScript functionality
	* Cons:
		+ Requires manual handling of edge cases (e.g., null or undefined objects)
		+ May be less convenient for some users

**Library and Purpose**

The Lodash library is a collection of small, reusable functions that can be used to make certain programming tasks easier. In this case, the `isEmpty` function is specifically designed to check if an object is empty.

**Special JS Feature/Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark. However, it's worth noting that the benchmark uses a custom object (`window.obj`) and its properties are dynamically generated using a `for` loop.

**Other Alternatives**

If you wanted to write similar benchmarks for other programming languages or libraries, you could consider the following alternatives:

* For checking if an object is empty:
	+ In Python, you might use the `len()` function on the dictionary's keys (e.g., `len(dictionary.keys())`)
	+ In Java, you might use a custom implementation of a hash table or a similar data structure
* For built-in comparisons using the `Object.keys()` method:
	+ Similar alternatives exist in other languages, such as JavaScript's `Array.prototype.length` for arrays

Keep in mind that the specifics will depend on the programming language and library being used.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36

Browser/OS: Chrome 70 on Linux

View result in a separate tab

Test name	Executions per second
_.isEmpty	1744654.1 Ops/sec
Object.keys().length	1954275.5 Ops/sec

Related benchmarks:

_.isEmpty vs Object.keys.length 1 (version: 0)

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

Created: 5 years ago by: Guest

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 one month ago):