Benchmark: Javascript filter vs lodash sumby

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/lodash/4.16.2/lodash.min.js"></script>

Script Preparation code:

window.array = [1, 4, 3, 4, 2, 2, 1, 5, 3, 5, 1, 4, 3, 4, 2, 2, 1, 5, 3, 5, 1, 4, 3, 4, 2, 2, 1, 5, 3, 5, 1, 4, 3, 4, 2, 2, 1, 5, 3, 5, 1, 4, 3, 4, 2, 2, 1, 5, 3, 5];

Tests:

Javascript filter
const x = window.array.filter(i => i === 3).length; return x;
Lodash Sumby
const x = _.sumBy(window.array, i => i === 3 ? 1 : 0); return x;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Javascript filter
Lodash Sumby

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 benchmark and explain what is being tested.

**Benchmark Overview**

The benchmark measures the performance of two approaches: using JavaScript's built-in `filter()` method versus using Lodash's `sumBy()` function.

**Options Compared**

There are two options being compared:

1. **JavaScript filter()**: This approach uses the `filter()` method to create a new array containing only the elements that match the condition (`i === 3`). The length of this filtered array is then returned.
2. **Lodash Sumby**: This approach uses Lodash's `sumBy()` function to sum up the values in the original array for each unique value, and then returns the total sum.

**Pros and Cons**

**JavaScript filter():**

Pros:

* Simple and lightweight
* Can be optimized by modern JavaScript engines

Cons:

* May incur additional overhead due to creating a new array
* Returns an integer value instead of a cumulative sum

**Lodash Sumby:**

Pros:

* More flexible and powerful, allowing for cumulative sums
* Less memory-intensive since it works directly on the original array

Cons:

* Requires an external library (Lodash) to be included in the benchmark environment
* May incur additional overhead due to function calls and memory allocation

**Library Overview - Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like array manipulation, string manipulation, and more. In this benchmark, Lodash's `sumBy()` function is used to calculate the cumulative sum of elements in the original array.

**Special JS Feature/ Syntax**

There isn't any special JavaScript feature or syntax being used in these test cases. The code simply uses standard JavaScript syntax for array operations.

**Other Alternatives**

If you wanted to write your own implementation without using Lodash, you could use a manual loop to iterate over the array and sum up the values. This approach would be similar to the `filter()` method but would require more lines of code.

Here's a simple example of how you might implement this:

```javascript
let result = 0;
for (let i of window.array) {
  if (i === 3) {
    result += i;
  }
}
return result;
```

This implementation has the same pros and cons as the `filter()` method, but without the convenience of a built-in function.

Related benchmarks:

Javascript filter vs lodash sumby (version: 0)

Comparing performance of: Javascript filter vs Lodash Sumby

Created: 3 years ago by: Guest

Jump to the latest result

Javascript filter

Lodash Sumby

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):