Benchmark: Lodash isEmpty vs Native Javascript, many keys

Lodash isEmpty vs Native Javascript, many keys (version: 0)

This benchmark compares the performance of lodash's `isEmpty` function with native JavaScript code for checking if an object is empty. The lodash `isEmpty` function checks if a value is an empty object, collection, map, or set. The native JavaScript code checks if an object has no own enumerable string keyed properties.

Comparing performance of: _.isEmpty vs Native JavaScript

Created: 7 months ago by: Guest

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HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js" integrity="sha512-WFN04846sdKMIP5LKNphMaWzU7YpMyCU245etK3g/2ARYbPK9Ub18eG+ljU96qKRCWh+quCY7yefSmlkQw1ANQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

Script Preparation code:

cspSrcs = {
    key: 'value'
};
for (let i = 0; i < 1000; ++i) {
  cspSrcs['a' + i] = i;
}

Tests:

_.isEmpty
_.isEmpty(cspSrcs);
Native JavaScript
Object.keys(cspSrcs).length === 0 && cspSrcs.constructor === Object;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEmpty
Native JavaScript

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 7 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser/OS: Chrome 124 on Windows

View result in a separate tab

Test name	Executions per second
_.isEmpty	15399.8 Ops/sec
Native JavaScript	16091.3 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 benchmark and explain what's being tested, compared, and the pros/cons of each approach.

**Benchmark Definition**

The benchmark compares the performance of two approaches:

1. Lodash's `isEmpty` function
2. Native JavaScript code for checking if an object is empty

The Lodash `isEmpty` function checks if a value is an empty object, collection, map, or set. The native JavaScript code checks if an object has no own enumerable string keyed properties.

**Script Preparation Code**

This code creates an object `cspSrcs` with 1000 keys and assigns each key a unique integer value. This object will be used to test the performance of the two approaches.

**Html Preparation Code**

The HTML code includes a reference to the Lodash library, which is used by the benchmark. The integrity attribute ensures that the loaded script is not tampered with.

**Individual Test Cases**

There are two test cases:

1. `_.isEmpty(cspSrcs);`: This test case uses the Lodash `isEmpty` function to check if the `cspSrcs` object is empty.
2. `Object.keys(cspSrcs).length === 0 && cspSrcs.constructor === Object;`: This test case uses native JavaScript code to check if the `cspSrcs` object has no own enumerable string keyed properties.

**Pros and Cons of each approach**

1. Lodash `isEmpty` function:
	* Pros: Convenient, easy-to-use, and well-tested.
	* Cons: Adds an additional dependency (the Lodash library) and may introduce overhead due to the library's functionality.
2. Native JavaScript code:
	* Pros: Fast, lightweight, and doesn't add any dependencies.
	* Cons: Requires manual implementation and can be prone to errors.

**Other considerations**

The benchmark also includes metadata about the test run, such as the browser type, device platform, operating system, and execution frequency per second. This information can be useful for understanding the performance characteristics of different browsers and devices.

**Alternative approaches**

Some alternative approaches to checking if an object is empty in JavaScript include:

* Using `for...in` loop to check if all enumerable properties have a value: `for (var prop in obj) { if (obj.hasOwnProperty(prop)) return false; }`
* Using `Object.keys()` and checking the length of the resulting array: `if (Object.keys(obj).length === 0) { ... }`
* Using a library like TypeScript or Flow to check for emptiness, which can provide additional benefits like type checking and error handling.

However, these approaches may not be as fast or convenient as the Lodash `isEmpty` function or native JavaScript code.

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