Benchmark: Lodash Test 143112

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var users = [
  { 'user': 'joey',  'age': 28 },
  { 'user': 'ross',    'age': 31 },
  { 'user': 'jessika', 'age': 21 },
  { 'user': 'amanda', 'age': 17 }
];

for (var i = 0; i < 1000; i++)
{
  	if (i == 30) continue;
	users.push({
    	'user': `User: ${i}`,
      	'age': i
    });
}

users.push({
  'user': `User: 30`,
  'age': 30
});

Tests:

Native
users.findIndex(u => u.age === 30)
Lodash
_.findIndex(users, u => u.age === 30)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native
Lodash

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared, and some pros and cons of each approach.

**Benchmark Overview**

The benchmark is testing two different implementations of finding an index in an array: one using JavaScript's native `findIndex` method and another using the popular utility library Lodash's `_.findIndex` function.

**Test Case 1: Native`

This test case uses the built-in JavaScript `findIndex` method to find the index of the first element in the `users` array that matches the condition (`u.age === 30`). The condition is met when the age is exactly 30. The test case also includes a special condition where it skips every 30th iteration using the `continue` statement.

**Test Case 2: Lodash**

This test case uses Lodash's `_.findIndex` function to achieve the same goal as the native JavaScript implementation. The purpose of this library is to provide a collection of reusable functions that make common programming tasks easier. In this case, it simplifies the process of finding an element in an array.

**Comparison and Pros/Cons**

Both implementations have their strengths:

* Native JavaScript `findIndex`:
	+ Pros: Built-in functionality, no dependencies on external libraries.
	+ Cons: May be slower due to the overhead of the V8 engine (JavaScript's runtime environment).
* Lodash's `_ findIndex`:
	+ Pros: Well-tested and optimized implementation, often faster than native JavaScript due to its Just-In-Time (JIT) compilation and caching mechanisms.
	+ Cons: Requires including an external library, which may add extra overhead.

**Library and Syntax Explanation**

Lodash is a popular utility library that provides a wide range of functions for tasks such as:

* Array manipulation
* String manipulation
* Object manipulation
* Functional programming utilities

In this specific test case, the `_ findIndex` function takes an array (`users`) and a callback function (`u => u.age === 30`) to find the index of the first element that matches the condition.

**Other Alternatives**

If you're looking for alternatives to Lodash or native JavaScript `findIndex`, consider:

* Other utility libraries like Underscore.js, Ramda, or Svelte's built-in functions.
* Custom implementations using plain JavaScript and its built-in functions (e.g., `forEach`, `some`, `filter`).

Keep in mind that the choice of implementation depends on your specific use case, performance requirements, and the size of your project.

**Additional Considerations**

When writing microbenchmarks like this one, it's essential to:

* Keep the test code simple and focused on the specific task at hand.
* Use a representative dataset (in this case, an array of 1000 users).
* Run multiple iterations to ensure accurate results.
* Consider using benchmarking frameworks or libraries that provide a more structured approach to writing benchmarks.

Related benchmarks:

Lodash Test 143112 (version: 0)

Comparing performance of: Native vs Lodash

Created: 3 years ago by: Guest

Jump to the latest result

Native

Lodash

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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