Benchmark: Iteration - MeasureThat.net

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Tests:

lodash shorthand
// create an array consisting of 100k items const array = Array(100000).fill('').map((_, i) => ({ index: i })) _.map(array, 'index')
map iteration
// create an array consisting of 100k items const array = Array(100000).fill('').map((_, i) => ({ index: i })) array.map(({ index }) => index)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash shorthand
map iteration

Fastest: N/A

Slowest: N/A

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

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Let's dive into the explanation of the provided benchmark.

**What is tested?**

The benchmark measures the performance of two approaches to iterating over an array in JavaScript:

1. Using the `_` shorthand (from the Lodash library) to map over the array.
2. Using a traditional `map()` method call without any shortcuts.

**Options compared:**

Two options are being compared here:

* Option 1: Using the `_` shorthand (Lodash's `map()` function)
	+ Pros:
		- Can be faster for certain use cases, especially when dealing with large arrays.
		- Simplifies code and reduces boilerplate.
	+ Cons:
		- Requires the Lodash library to be included in the test environment.
		- May not perform well if the array is very large or has complex data structures.
* Option 2: Traditional `map()` method call
	+ Pros:
		- Does not require any external libraries.
		- Can be more predictable and easier to understand for those familiar with traditional JavaScript methods.
	+ Cons:
		- May perform slower than the `_` shorthand due to additional overhead.

**Library usage:**

The Lodash library is being used in one of the benchmark test cases. Specifically, the `map()` function from Lodash is used in the first test case using the `_` shorthand.

Lodash's purpose is to provide a collection of small, reusable functions that can be used to simplify common tasks and make code more concise and efficient. In this case, the `_` shorthand provides a convenient way to map over an array without having to specify each step individually.

**Special JavaScript feature/syntax:**

The benchmark uses a special syntax for the `map()` function call in Option 2. The syntax `array.map(({ index }) => index)` is called "object destructuring" and allows you to extract properties from an object (in this case, the object returned by the map() function) into separate variables.

Object destructuring can improve code readability and reduce boilerplate, but it may also add some complexity for those unfamiliar with this syntax.

**Other alternatives:**

If you wanted to implement a custom implementation of `map()` for this benchmark, you could use a traditional loop instead of an array method call. For example:
```javascript
function map(array, callback) {
  const result = [];
  for (let i = 0; i < array.length; i++) {
    result.push(callback(array[i]));
  }
  return result;
}
```
This implementation would not require any external libraries and could be implemented in a single function. However, it may perform slower than the `_` shorthand or traditional `map()` method call due to additional overhead.

Keep in mind that this is just one possible alternative implementation. Depending on your specific use case, you might choose to implement a custom solution using different techniques, such as parallel processing or lazy evaluation.

Related benchmarks:

Iteration (version: 0)

Comparing performance of: lodash shorthand vs map iteration

Created: 3 years ago by: Guest

Jump to the latest result

lodash shorthand

map iteration

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):