Benchmark: Lodash partition VS loop

HTML Preparation code:

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

Script Preparation code:

var arr = [];

for (i = 0; i < 1000; i++) {
  arr[i] = i;
}

Tests:

Lodash
var [met, rest] = _.partition(arr, function(i) { return i % 2 === 0 });
loop push
var met = []; var rest = []; for (var i = 0; i < arr.length; i++) { if (arr[i] % 2 === 0){ met.push(arr[i]);} else { rest.push(arr[i]); } }
filter
var rest = []; arr = arr.filter(e => { if (e % 2 === 0) { return true; } else { rest.push(e); return false; } });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash
loop push
filter

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 is tested in each benchmark.

**Benchmark Definition**

The benchmark definition is a JavaScript code snippet that defines how to split an array into two parts based on a condition. The three benchmarks compare different approaches:

1. **Lodash partition**: This approach uses the `_.partition` function from the Lodash library, which takes two arguments: the array to be split and a callback function that returns a boolean value indicating whether each element should be included in the first part or not.
2. **Loop with push**: This approach manually creates two arrays, one for elements that satisfy the condition (`met`) and another for elements that don't (`rest`). The elements are pushed into their respective arrays using loops.
3. **Filter method**: This approach uses the `filter` method of the array to create two new arrays: one with elements satisfying the condition and another with elements not satisfying it.

**Options Comparison**

Here's a brief overview of each option, including their pros and cons:

1. **Lodash partition**:
	* Pros: concise, efficient, and reliable.
	* Cons: depends on external library (Lodash).
2. **Loop with push**:
	* Pros: no external dependencies, easy to understand for beginners.
	* Cons: less efficient, more verbose, and error-prone due to manual array management.
3. **Filter method**:
	* Pros: simple, readable, and efficient.
	* Cons: may be slower than Lodash's `partition` function, and can create new arrays unnecessarily.

**Library Usage**

The benchmark uses the Lodash library for its `partition` function. Lodash is a popular JavaScript utility library that provides various functions for tasks such as array manipulation, object merging, and more.

**Special JS Features or Syntax**

There are no special features or syntax used in this benchmark that are not standard JavaScript. However, some readers might be familiar with the use of arrow functions (`e => { ... }`) which were introduced in ECMAScript 2015 (ES6).

**Other Alternatives**

If you'd like to explore alternative approaches, here are a few options:

* Using `Array.prototype.filter()` or `Array.prototype.reduce()`, which might be slightly faster than the `filter` method used in this benchmark.
* Implementing a custom implementation using bitwise operations and conditional statements.
* Using a library like `lodash-es` or other alternatives to Lodash, such as `ramda`.

Keep in mind that these alternatives may have different performance characteristics, readability, and maintainability compared to the approaches used in this benchmark.

Related benchmarks:

Lodash partition VS loop (version: 0)

Comparing performance of: Lodash vs loop push vs filter

Created: 2 years ago by: Guest

Jump to the latest result

Lodash

loop push

filter

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):