Benchmark: array flat vs _.flatten

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.core.js"></script>

Tests:

array flat
var a = ['hello', ['a', 'bc']]; var b = a.flat();
_.flattern
var a = ['hello', ['a', 'bc']]; var b = _.flatten(a);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array flat
_.flattern

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36

Browser/OS: Chrome 142 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
array flat	10567217.0 Ops/sec
_.flattern	32907918.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll explain the benchmark, its options, pros and cons, and other considerations.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark test case on MeasureThat.net. The test compares two approaches to flatten an array: `Array.flat()` (native) and `_`._flatten() (from the Lodash library).

**Options Compared**

The two options being compared are:

1. **Native `Array.flat()`**: This method is introduced in ECMAScript 2019 and allows you to flatten arrays using a more concise syntax.
2. **_._flatten() from Lodash library**: This function takes an array as input and returns a new flattened array.

**Pros and Cons of Each Approach**

1. **Native `Array.flat()`**:
	* Pros:
		+ More concise syntax
		+ Easier to read and understand
		+ No additional dependencies required (it's built-in)
	* Cons:
		+ Requires ECMAScript 2019 support
		+ Not as widely supported as older browsers or environments
2. **_._flatten() from Lodash library**:
	* Pros:
		+ Widely supported across various browsers and environments
		+ No additional dependencies required (it's a built-in part of Lodash)
	* Cons:
		+ Requires an extra dependency (Lodash) to be included in the project
		+ More verbose syntax compared to native `Array.flat()`

**Other Considerations**

* **Browser Support**: The benchmark test case uses Chrome 74, which is a relatively modern browser. However, it's essential to note that not all browsers support ECMAScript 2019 features or Lodash functions.
* **Performance**: The actual performance difference between these two approaches may vary depending on the specific use case and the underlying JavaScript engine.

**Lodash Library**

The provided benchmark uses the Lodash library (version 4.17.5) to include the `_._flatten()` function. Lodash is a popular utility library that provides a wide range of functional programming helpers, including array manipulation functions like `_flatten()`. The library is widely used in web development and other JavaScript applications.

**Special JS Feature/Syntax**

There are no special JavaScript features or syntax being tested in this benchmark. Both approaches use standard JavaScript concepts and do not involve any advanced features like async/await, promise-based APIs, or modern language constructs like classes or destructuring.

If you're interested in exploring alternative approaches or optimizations for array flattening, I can provide suggestions based on common patterns or best practices.

Related benchmarks:

array flat vs _.flatten (version: 0)

Comparing performance of: array flat vs _.flattern

Created: 6 years ago by: Guest

Jump to the latest result

array flat

_.flattern

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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