Benchmark: _.compact vs filter(Boolean)

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script>

Script Preparation code:

var elements = [0, 1, false, 2, '', 3];

Tests:

_.compact
_.compact(elements);
filter(Boolean)
elements.filter(Boolean)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.compact
filter(Boolean)

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36

Browser/OS: Chrome 142 on Linux

View result in a separate tab

Test name	Executions per second
_.compact	42094860.0 Ops/sec
filter(Boolean)	36469500.0 Ops/sec

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 is being tested.

**Overview**

The benchmark compares two JavaScript functions: `_.compact` from Lodash library and the `filter(Boolean)` method on an array. The goal is to determine which function performs better in terms of execution speed, measured in executions per second.

**Benchmark Definition JSON**

The benchmark definition JSON includes:

* `Name`: The name of the benchmark, which is " _.compact vs filter(Boolean)".
* `Description`: An empty string, indicating no description for this benchmark.
* `Script Preparation Code`: A JavaScript code snippet that creates an array `elements` with various values, including zeros, ones, falsy values, and empty strings. This array will be used as input for both functions being tested.
* `Html Preparation Code`: A script tag that loads the Lodash library (version 4.17.15) from a CDN.

**Individual Test Cases**

The benchmark includes two test cases:

1. **_.compact(elements)**: This test case runs the `_.compact` function on the `elements` array, which removes falsey values from the array.
2. **elements.filter(Boolean)**: This test case runs the `filter(Boolean)` method on the `elements` array, which also removes falsy values.

**Library and Syntax**

The Lodash library is used in this benchmark. `_.` is a convention for accessing functions within the Lodash namespace. The `compact` function is a utility function that returns a new array with all falsey values removed from the original array.

The syntax used here is JavaScript, specifically ES5+ syntax.

**Pros and Cons of Each Approach**

Both approaches achieve similar results by removing falsey values from the input array. However:

* **_.compact(elements)**: This approach uses the `_.compact` function from Lodash, which:
	+ Pros: A well-tested and optimized utility function.
	+ Cons: Requires loading an external library (Lodash).
* **elements.filter(Boolean)**: This approach uses a built-in method on arrays in JavaScript:
	+ Pros: Built-in functionality eliminates the need for an external library.
	+ Cons: May have slower performance compared to a dedicated utility function.

**Device-Specific Considerations**

The benchmark is run on Chrome 129 on a Mac OS X 10.15.7 desktop platform, which might be subject to specific limitations or optimizations. The results may vary on different devices or platforms.

**Alternative Approaches**

If you wanted to write this benchmark yourself, you could implement the two approaches using standard JavaScript:

```javascript
// _.compact(elements)
function compact(arr) {
  const result = [];
  for (const element of arr) {
    if (element) {
      result.push(element);
    }
  }
  return result;
}

// elements.filter(Boolean)
function filterBooleans(arr) {
  return arr.filter((element) => element !== false);
}
```

Keep in mind that these implementations may not be as optimized or efficient as the Lodash implementation.

Related benchmarks:

_.compact vs filter(Boolean) (version: 0)

Comparing performance of: _.compact vs filter(Boolean)

Created: 5 years ago by: Guest

Jump to the latest result

_.compact

filter(Boolean)

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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