Benchmark: Lodash reduce filter vs Native reduce filter vs Lodash filter vs Native filter

HTML Preparation code:

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

Script Preparation code:

var testCopy = null;
var testArray = [{
  id: 1,
  description: 'Random description.',
  testDate: new Date(),
  testBoolean: true,
  testObject: {
    testString: 'test string',
    testNumber: 12345
  },
  testArray: [{
    myName: 'test name',
    myNumber: 123245
  }]
},{
  id: 2,
  description: 'Random description.',
  testNumber: 123456789,
  testBoolean: true,
  testObject: {
    testString: 'test string',
    testNumber: 12345
  },
  testArray: [{
    myName: 'test name',
    myNumber: 123245
  }]
}];

Tests:

Reduce filter
testCopy = testArray.reduce((accumulator, currentValue) => { if(currentValue.id != 2) { currentValue.description = 'test'; accumulator.push(currentValue); return accumulator; } return accumulator; },[])
Lodash reduce filter
testCopy = _.reduce(testArray,(accumulator, currentValue) => { if(currentValue.id != 2) { currentValue.description = 'test'; accumulator.push(currentValue); return accumulator; } return accumulator; },[]);
Native filter
testCopy = testArray.filter(o => { if(o.id != 2) { o.description = 'test'; return o; } });
Lodash filter
testCopy = _.filter(testArray, function(o) { if(o.id != 2) { o.description = 'test'; return o; } });
Reduce modify
testCopy = testArray.reduce((accumulator, currentValue) => { if(currentValue.id == 2) { currentValue.description = 'test'; accumulator.push(currentValue); return accumulator; } return accumulator; },[])
Map modify
testCopy = testArray.map((item)=>{ if(item.id == 2){ item.description = 'test'; } return item; });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Reduce filter
Lodash reduce filter
Native filter
Lodash filter
Reduce modify
Map modify

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared, and some pros/cons of different approaches.

**Benchmark Overview**

The benchmark measures the performance of four different methods for filtering an array in JavaScript:

1. `reduce` (both native and Lodash implementation)
2. `filter` (both native and Lodash implementation)

The test data consists of a large array with multiple objects, each containing several properties. The filter method should remove all objects from the array except those with `id == 2`, while modifying their `description` property.

**Options Compared**

Here's a summary of the options being compared:

* **Native reduce**: Uses the built-in `reduce()` method to iterate over the array and accumulate the filtered elements.
* **Lodash reduce**: Uses Lodash's implementation of `reduce()`, which is a modified version of the native method.
* **Native filter**: Uses the built-in `filter()` method to create a new array with only the desired elements.
* **Lodash filter**: Uses Lodash's implementation of `filter()`, which is a modified version of the native method.

**Pros and Cons**

Here are some pros and cons for each approach:

1. **Native reduce**
	* Pros:
		+ Lightweight and efficient
		+ Suitable for small to medium-sized datasets
	* Cons:
		+ Can be slower than optimized libraries like Lodash for large datasets
2. **Lodash reduce**
	* Pros:
		+ Optimized for performance on large datasets
		+ Provides a convenient, intuitive API for filtering and reducing arrays
	* Cons:
		+ Adds extra overhead due to the use of an external library
3. **Native filter**
	* Pros:
		+ Simple and lightweight
		+ Suitable for most use cases, including small to medium-sized datasets
	* Cons:
		+ Can be slower than optimized libraries like Lodash for large datasets
4. **Lodash filter**
	* Pros:
		+ Optimized for performance on large datasets
		+ Provides a convenient, intuitive API for filtering arrays
	* Cons:
		+ Adds extra overhead due to the use of an external library

**Library and Syntax**

The benchmark uses Lodash as one of its libraries. Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, object creation, and more.

The syntax used in the benchmark is standard JavaScript, with no additional context or dependencies required.

**Execution Results**

The benchmark's execution results show the performance of each method across different browsers and devices. The results are sorted by execution speed, with the fastest method appearing first.

Keep in mind that these results may vary depending on the specific use case, data size, and environment.

Latest run results:

Run details: (Test run date: 7 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:125.0) Gecko/20100101 Firefox/125.0

Browser/OS: Firefox 125 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
Reduce filter	57870372.0 Ops/sec
Lodash reduce filter	39526032.0 Ops/sec
Native filter	51568620.0 Ops/sec
Lodash filter	39434636.0 Ops/sec
Reduce modify	46049584.0 Ops/sec
Map modify	49063268.0 Ops/sec

Related benchmarks:

Lodash reduce filter vs Native reduce filter vs Lodash filter vs Native filter (version: 9)

compare filter methods on arrays that both modify objects and remove items from the array.

Comparing performance of: Reduce filter vs Lodash reduce filter vs Native filter vs Lodash filter vs Reduce modify vs Map modify

Created: 5 years ago by: Registered User

Jump to the latest result

Reduce filter

Lodash reduce filter

Native filter

Lodash filter

Reduce modify

Map modify

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):