Benchmark: Test arrayLike transformation

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>

Script Preparation code:

const characters = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz1234567890';

var randomMap = new Map();
for (let l = 0; l < 1000; l++) {
  randomMap.set(l, characters[Math.floor(Math.random() * characters.length)]);
}

Tests:

Native arrayLike transformation
Array.from(randomMap.keys())
Lodash toArray
_.toArray(randomMap.keys())

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native arrayLike transformation
Lodash toArray

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser/OS: Chrome 124 on Windows

View result in a separate tab

Test name	Executions per second
Native arrayLike transformation	365576.5 Ops/sec
Lodash toArray	213793.3 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 benchmark and explain what's being tested, compared, and considered.

**Benchmark Purpose:**

The purpose of this benchmark is to compare the performance of two approaches for transforming an array-like object into a native JavaScript array. The array-like object in question is created from a random map with 1000 key-value pairs, where each value is a character string chosen randomly from a large set.

**Options being Compared:**

There are two options being compared:

1. **Native ArrayLike Transformation:** This involves using the `Array.from()` method to create a native JavaScript array from the keys of the random map.
2. **Lodash `toArray` Method:** This involves using the `lodash` library's `toArray` function to convert the keys of the random map into an array.

**Pros and Cons:**

* **Native ArrayLike Transformation:**
	+ Pros:
		- No external dependencies (e.g., no extra library load).
		- Native JavaScript implementation, which is typically faster.
	+ Cons:
		- May require more manual effort to set up and manage the array-like object.
		- Performance may vary depending on browser support for `Array.from()`.
* **Lodash `toArray` Method:**
	+ Pros:
		- Easy to use and set up, with minimal code changes required.
		- Lodash provides a well-tested and widely adopted implementation.
	+ Cons:
		- Requires loading an additional library (lodash), which may introduce overhead.
		- May not be as efficient as native implementation.

**Library:**

The `lodash` library is used in the benchmark for its `toArray` function, which converts an array-like object into a regular JavaScript array. Lodash is a popular utility library that provides many useful functions for data manipulation and transformation.

**Special JS Feature or Syntax:**

There are no special JavaScript features or syntaxes being tested in this benchmark. The code uses standard JavaScript syntax and does not rely on any advanced or experimental features.

**Other Considerations:**

* **Browser Support:** Both approaches should work across most modern browsers, but `Array.from()` may have varying degrees of support depending on the browser version.
* **Performance Variability:** As with any benchmark, performance results may vary between different systems and environments. The benchmark is designed to measure relative performance differences between the two options.

**Alternative Approaches:**

Other approaches for transforming an array-like object into a native JavaScript array might include:

1. Using `Array.prototype.slice()` or `Array.prototype.concat()` in combination with other methods.
2. Utilizing modern JavaScript features like `Symbol.iterator` and iterable objects.
3. Implementing a custom transformation function using Array methods.

Keep in mind that these alternatives may introduce additional complexity, dependencies, or performance overhead compared to the native implementation or Lodash's `toArray` method.

Related benchmarks:

Test arrayLike transformation (version: 0)

Comparing performance of: Native arrayLike transformation vs Lodash toArray

Created: one year ago by: Guest

Jump to the latest result

Native arrayLike transformation

Lodash toArray

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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