Benchmark: lodash groupBy vs find

HTML Preparation code:

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

Script Preparation code:

var array = []
for (let index = 0; index < 1000; index++) {
    array.push({
        _id: index,
        name: `${index}Bruno`
    })
}

Tests:

lodash
var groped = _.groupBy(array, '_id') var result = groped['994']
find
var result = array.find(el => el._id === "994")

Historical Performance Data aggregated from 8 community runs

Desktop Results:

Chrome 8 runs

find

1.7M/s

lodash

33K/s

Fastest: find (51.4x faster)

View exact numbers

✓ find: 1,710,045 ops/sec
• lodash: 33,240 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash
find

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36

Browser/OS: Chrome 149 on Windows

View result in a separate tab

find

3.3M/s

lodash

50K/s

View exact numbers

Test name	Executions per second
✓ find	3,327,575 Ops/sec
lodash	50,150 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided JSON represents a JavaScript microbenchmarking test, which compares the performance of two approaches: using Lodash's `groupBy` function and using the `find` method without any libraries or custom functions.

**Test Cases**

There are two individual test cases:

1. **Lodash `groupBy`**: This test case uses the Lodash library to group an array by a specific property (`_id`) and then retrieves a value from the resulting object.
2. **`find` method**: This test case uses the built-in `find` method without any libraries or custom functions to find an element in the array that matches a certain condition (in this case, `_id === "994"`).

**Options Compared**

The two approaches are compared based on their performance. The benchmark measures the number of executions per second for each approach.

**Pros and Cons of Each Approach**

1. **Lodash `groupBy`**:
	* Pros:
		+ More concise and expressive code.
		+ Lodash provides a familiar API for grouping arrays.
	* Cons:
		+ Adds an external library dependency, which may not be desirable in all scenarios.
		+ May have additional overhead due to the library's presence.
2. **`find` method**:
	* Pros:
		+ No external library dependencies required.
		+ Built-in and widely supported across different browsers and environments.
	* Cons:
		+ More verbose code compared to Lodash `groupBy`.
		+ May not be as efficient for large datasets due to the additional overhead of searching through the array.

**Library Used**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, object transformation, and more. In this benchmark, Lodash's `groupBy` function is used to group an array by a specific property.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntax used in these test cases. The code uses standard JavaScript syntax and conventions.

**Other Alternatives**

If you need to compare the performance of different approaches for grouping arrays, here are some alternative methods:

1. **Array.prototype.reduce()**: You can use `reduce()` method to achieve similar results as `groupBy`, but it may be less efficient due to the additional overhead of iterating through the array.
2. **Array.prototype.forEach()**: You can also use `forEach()` method in combination with a callback function to iterate through the array and perform grouping, but this approach may be less efficient than using `reduce()` or Lodash's `groupBy`.
3. **Custom implementation**: You can write your own custom implementation for grouping arrays, which would allow you to tailor the performance characteristics of the approach to your specific use case.

In summary, the benchmark compares two approaches for grouping arrays: using Lodash's `groupBy` function and using the `find` method without any libraries or custom functions. The choice between these approaches depends on the trade-offs between code conciseness, library dependencies, and performance characteristics.

lodash groupBy vs find (version: 0) Benchmark.js

Comparing performance of: `lodash vs find`

Created: 5 years ago by: Guest

Go to the latest result

lodash

find

Historical Performance Data aggregated from 8 community runs

Desktop Results:

Chrome 8 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

lodash groupBy vs find (version: 0) Benchmark.js

Comparing performance of: lodash vs find

Created: 5 years ago by: Guest

Go to the latest result

lodash

find

Historical Performance Data aggregated from 8 community runs

Desktop Results:

Chrome 8 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `lodash vs find`