Benchmark: _filter vs es6 filter

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>

Script Preparation code:

window.foo = [];

for (var i = 0, len = 100; i < len; i++) {
  foo[i] = i;
}

Tests:

_filter for even
_.filter(window.foo, i => i % 2 === 0)
es6 filter for even
window.foo.filter(i => i % 2 === 0)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_filter for even
es6 filter for even

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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I'll break down the benchmark and explain what's being tested, compared, and considered.

**Benchmark Overview**

The benchmark compares the performance of two approaches to filter an array of numbers in JavaScript: `_filter` (using Lodash) and `es6 filter` (using native JavaScript).

**Comparison**

The two test cases are:

1. `_filter for even`: This test case uses the `_filter` method from Lodash, which takes a predicate function as its second argument. The predicate function checks if each number in the array is even by using the modulo operator (`i % 2 === 0`).
2. `es6 filter for even`: This test case uses the native JavaScript `filter()` method, also with a predicate function that checks if each number is even.

**Options Compared**

The options being compared are:

* `_filter` (Lodash) vs `es6 filter` (native JavaScript)
* The use of a predicate function to determine which elements to keep in the filtered array
* The performance implications of using Lodash vs native JavaScript for this specific task

**Pros and Cons of Each Approach**

**_Filter (Lodash)**

Pros:

* Encapsulation: Lodash provides a reusable utility function that abstracts away the implementation details, making it easier to switch between different JavaScript engines or versions.
* Readability: The code is often more concise and readable, as the predicate function is clearly separated from the filtering logic.

Cons:

* Overhead: Using an external library like Lodash introduces some overhead due to loading and initialization time.
* Compatibility: Depending on the version of Lodash, there might be compatibility issues with older JavaScript engines or environments.

**es6 filter (native JavaScript)**

Pros:

* Performance: Native JavaScript is generally faster than using a library like Lodash, as it doesn't involve additional function calls and overhead.
* Control: You have more control over the implementation details, allowing for fine-tuning of performance-critical parts.

Cons:

* Code readability: The code might be less readable due to the need to explicitly implement the filtering logic using the `filter()` method.
* Complexity: Depending on the complexity of the filtering predicate, the native JavaScript code can become more complex and harder to maintain.

**Library: Lodash**

Lodash is a popular JavaScript library that provides a collection of utility functions for tasks like array manipulation, string formatting, and more. In this case, `_filter` is used to filter arrays based on a given condition.

**Special JS Feature/ Syntax**

There are no special JavaScript features or syntaxes mentioned in the benchmark.

**Other Considerations**

When choosing between `_filter` (Lodash) and `es6 filter` (native JavaScript), consider the following:

* Performance: If you need to perform filtering operations frequently, native JavaScript might be a better choice due to its performance advantages.
* Code readability and maintainability: Lodash provides a concise and readable implementation of the filtering logic, making it easier to understand and modify.
* Compatibility: Make sure that both options work correctly in your target environment and with the required versions of JavaScript engines or browsers.

**Alternative Approaches**

Other approaches to filter an array of numbers in JavaScript include:

* Using `Array.prototype.every()` (instead of `filter()`)
* Implementing a custom filtering algorithm from scratch
* Using other libraries or frameworks that provide similar functionality, such as `Ramda` or `Redux`

Related benchmarks:

_filter vs es6 filter (version: 0)

Comparing performance of: _filter for even vs es6 filter for even

Created: 4 years ago by: Guest

Jump to the latest result

_filter for even

es6 filter for even

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):