Benchmark: Array.prototype.slice vs _.take

HTML Preparation code:

<script src="lodash.js"></script>

Script Preparation code:

var array = [...Array(1000).keys()];

Tests:

Lodash take
_.take(55,77)
Array.prototype.slice
array.slice(55,77)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash take
Array.prototype.slice

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 9 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:130.0) Gecko/20100101 Firefox/130.0

Browser/OS: Firefox 130 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
Lodash take	179486672.0 Ops/sec
Array.prototype.slice	53328976.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Purpose**

The benchmark compares two approaches: `Array.prototype.slice` (specifically, its implementation in modern JavaScript engines) against `_.take` from the Lodash library. The goal is to determine which approach is faster for a specific use case.

**Options Compared**

There are two options being compared:

1. **`.slice()`**: This method is part of the built-in Array prototype in JavaScript. It creates a shallow copy of a portion of an array.
2. **`_.take()` from Lodash**: This function takes a number of elements from an array and returns them.

**Pros and Cons**

**`.slice()`**:

* Pros:
	+ Built-in, so it's likely to be highly optimized and widely supported.
	+ Can handle large arrays efficiently.
* Cons:
	+ May not provide the same level of control over the slice operation as `_.take()`.
	+ May incur additional overhead due to its built-in nature.

**`_.take()` from Lodash**:

* Pros:
	+ Provides more control over the slice operation, allowing for easier manipulation and optimization.
	+ Can be used with other Lodash functions for chaining.
* Cons:
	+ Requires an external library (Lodash), which may add overhead due to loading time.
	+ May not be optimized as well as `.slice()`.

**Other Considerations**

The benchmark prepares a sample array of 1000 elements using `Array.from()`, and then uses the two options to extract a subset of 22 elements. The Lodash library is included in the HTML header, making its functions available for use.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for data manipulation, array operations, and more. `_.take()` is one of its many functions, designed to take a specified number of elements from an array and return them.

**Special JS Feature/Syntax**

There are no special features or syntax used in this benchmark. It's a straightforward comparison of two programming approaches using built-in JavaScript methods.

**Alternatives**

If you wanted to write your own `slice()` implementation, you could use a simple loop-based approach:
```javascript
function slice(arr, start, end) {
  let result = [];
  for (let i = start; i < end; i++) {
    result.push(arr[i]);
  }
  return result;
}
```
Alternatively, if you wanted to write your own `_.take()` implementation without using Lodash, you could use the following code:
```javascript
function take(arr, n) {
  let result = [];
  for (let i = 0; i < n; i++) {
    result.push(arr[i]);
  }
  return result;
}
```
Keep in mind that these implementations would likely be less optimized and more verbose than the built-in `slice()` and Lodash's `_.take()`.

Related benchmarks:

Array.prototype.slice vs _.take (version: 0)

Comparing performance of: Lodash take vs Array.prototype.slice

Created: one year ago by: Guest

Jump to the latest result

Lodash take

Array.prototype.slice

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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