Benchmark: chunk recursive VS while VS lodash.chunk round 2

Script Preparation code:

var _list = [];
for (var i = 0; i < 1000 * 1000; i++) {
  _list.push(i);
}
var chunkR = (array, size) => array.length ? [array.splice(0,size), ...chunkR(array, size)]:[]
var chunkW = (array, size) => {
  const R = new Array(Math.ceil(array.length / size))
  while (array.length)
    R.push(array.splice(0, size))
  return R
}

// lodash shit 
function slice(array, start, end) {
  let length = array == null ? 0 : array.length
  if (!length) {
    return []
  }
  start = start == null ? 0 : start
  end = end === undefined ? length : end

  if (start < 0) {
    start = -start > length ? 0 : (length + start)
  }
  end = end > length ? length : end
  if (end < 0) {
    end += length
  }
  length = start > end ? 0 : ((end - start) >>> 0)
  start >>>= 0

  let index = -1
  const result = new Array(length)
  while (++index < length) {
    result[index] = array[index + start]
  }
  return result
}
function toInteger(value) {
  const result = (value)
  const remainder = result % 1

  return remainder ? result - remainder : result
}


function chunkL(array, size = 1) {
  size = Math.max(toInteger(size), 0)
  const length = array == null ? 0 : array.length
  if (!length || size < 1) {
    return []
  }
  let index = 0
  let resIndex = 0
  const result = new Array(Math.ceil(length / size))

  while (index < length) {
    result[resIndex++] = slice(array, index, (index += size))
  }
  return result
}
var list = [..._list]

Tests:

splice Recurcive
const list = [..._list] const c = chunkR(list, 200) if (c.length != 5000) throw new Error('bad result')
splice While
const list = [..._list] const c = chunkL(list, 200) if (c.length != 5000) throw new Error('bad result')
lodash chunk
const list = [..._list] const c = chunkL(list, 200) if (c.length != 5000) throw new Error('bad result')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
splice Recurcive
splice While
lodash chunk

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's dive into the world of MeasureThat.net and explore what's tested in this benchmark.

**Benchmark Overview**

The benchmark is designed to compare three different approaches for chunking (dividing) an array: recursive using `splice`, while using a loop, and using the `lodash.chunk` function. The benchmark measures the performance of each approach on an array of 5,000 elements.

**Approaches Compared**

1. **Recursive using `splice`**: This approach uses the `splice()` method to remove elements from the original array in chunks. The `splice()` method modifies the original array and returns an array of removed elements.
2. **While loop**: This approach uses a while loop to iterate over the array, removing elements in chunks.
3. **Lodash `chunk` function**: This approach uses the `lodash.chunk` function, which is designed specifically for chunking arrays.

**Pros and Cons**

1. **Recursive using `splice`**:
	* Pros: Simple to implement and easy to understand.
	* Cons: Modifies the original array, can lead to performance issues due to repeated calls to `splice()`.
2. **While loop**:
	* Pros: Avoids modifying the original array and can be more efficient than recursive approaches.
	* Cons: Requires manual looping and element indexing, which can be error-prone.
3. **Lodash `chunk` function**:
	* Pros: Designed for chunking arrays, optimized for performance, and easy to use.
	* Cons: Requires including the `lodash` library, which may add overhead.

**Library Usage**

The benchmark uses the `lodash` library for its `chunk` function. The `lodash` library is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, string manipulation, and more.

**Special JS Features/Syntax**

This benchmark does not use any special JavaScript features or syntax beyond what's typically used in everyday development.

**Other Alternatives**

If you're interested in exploring alternative approaches, here are some options:

* Using `Array.prototype.slice()` to create a copy of the array before chunking it.
* Utilizing `Map` data structure to efficiently chunk the array without modifying the original array.
* Leveraging modern JavaScript features like `for...of` loops and `Promise.all()` to improve performance.

Keep in mind that these alternatives may have their own trade-offs and require careful consideration of performance, memory usage, and code readability.

Related benchmarks:

chunk recursive VS while VS lodash.chunk round 2 (version: 1)

Comparing performance of: splice Recurcive vs splice While vs lodash chunk

Created: 4 years ago by: Registered User

Jump to the latest result

splice Recurcive

splice While

lodash chunk

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):