Benchmark: native findIndex vs lodash findIndex vs lodash find using startFrom

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>

Script Preparation code:

var users = [
  { 'user': 'joey',  'age': 28 },
  { 'user': 'ross',    'age': 31 },
  { 'user': 'chandler', 'age': 30 },
  { 'user': 'jessika', 'age': 21 },
  { 'user': 'amanda', 'age': 17 }
]

Tests:

Native findIndex
let index = users.findIndex((u, idx) => {if (idx < 2) return false; return u.age === 30}) let user = users[index]
_.findIndex
let index = _.findIndex(users, u => u.age === 30, 2) let user = users[index]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native findIndex
_.findIndex

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the provided JSON and explain what's being tested, along with the pros and cons of each approach.

**Benchmark Overview**

The benchmark compares the performance of three approaches:

1. Native JavaScript `findIndex` method
2. Lodash `findIndex` function
3. Lodash `find` function

All three tests aim to find an element in a given array (`users`) based on its age property, but with some differences in their implementation.

**Native JavaScript `findIndex` Method**

The native `findIndex` method is used to search for the first index at which a specified value occurs in the array. In this test case, it's used to find an element with `age === 30`.

Pros:

* Fast and efficient (no dependencies on external libraries)
* Well-supported by modern JavaScript engines

Cons:

* Can be slower than optimized library implementations
* Limited control over the search algorithm

**Lodash `findIndex` Function**

The Lodash `findIndex` function is a wrapper around the native `findIndex` method, but with some additional features and optimizations. In this test case, it's used to find an element in the `users` array based on its age property, starting from index 2.

Pros:

* Faster than native `findIndex` due to Lodash's optimization
* Provides additional features like starting from a specific index

Cons:

* Dependent on external library (Lodash)
* May introduce overhead due to additional function calls and checks

**Lodash `find` Function**

The Lodash `find` function is another wrapper around the native `Array.prototype.find()` method. In this test case, it's used to find an element in the `users` array based on its age property.

Pros:

* Similar performance benefits as Lodash `findIndex`
* Provides additional features like finding the first element matching a condition

Cons:

* Dependent on external library (Lodash)
* May introduce overhead due to additional function calls and checks

**Library Explanation**

In this benchmark, two libraries are used:

1. **Lodash**: A popular JavaScript utility library that provides various functions for tasks like array manipulation, string manipulation, and more.
2. **lodash.min.js**: The compressed version of the Lodash library, used in the benchmark.

**Other Considerations**

When choosing between these approaches, consider the following factors:

* Performance: Native `findIndex` may be faster, but optimized library implementations can provide similar performance benefits.
* Control: If you need fine-grained control over the search algorithm, native `findIndex` might be a better choice.
* Convenience: Lodash provides additional features and optimizations, making it easier to use in certain scenarios.

**Alternatives**

If you're not interested in using external libraries like Lodash, you can explore other alternatives:

1. **Native `Array.prototype.find()` method**: Similar to native `findIndex`, but for finding the first element matching a condition.
2. **Other optimized JavaScript libraries**: Libraries like FastFind or Arrayify provide optimized array manipulation functions that might outperform Lodash in specific scenarios.

In summary, this benchmark compares the performance of three approaches: native JavaScript `findIndex`, Lodash `findIndex`, and Lodash `find`. Each approach has its pros and cons, and choosing the right one depends on your specific requirements and preferences.

Related benchmarks:

native findIndex vs lodash findIndex vs lodash find using startFrom (version: 0)

Compare performance of native [].findIndex and _.findIndex and _.find

Comparing performance of: Native findIndex vs _.findIndex

Created: 3 years ago by: Guest

Jump to the latest result

Native findIndex

_.findIndex

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):