Benchmark: lodash groupBy vs lodash keyBy 2

HTML Preparation code:

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

Script Preparation code:

var max2 = 1000000; // 1,000,000 (1 Million)

var data = [];
for (var i = 0; i <= max2; i++) { data.push({ id: i }); }

Tests:

Lodash group
_.groupBy(data, ({ id }) => id)
Lodash key by
_.groupBy(data, ({ id }) => id)

Historical Performance Data aggregated from 11 community runs

Desktop Results:

Chrome 11 runs

Lodash group

28/s

Lodash key by

27/s

View exact numbers

✓ Lodash group: 28 ops/sec
• Lodash key by: 27 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 group
Lodash key by

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser/OS: Chrome 136 on Mac OS X 10.15.7

View result in a separate tab

Lodash group

36/s

Lodash key by

35/s

View exact numbers

Test name	Executions per second
✓ Lodash group	36 Ops/sec
Lodash key by	35 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmarking scenario.

**What is being tested?**

The provided JSON represents two individual test cases, each testing the performance of two different methods for grouping data using the Lodash library: `groupBy` and `keyBy`. The test case "Lodash groupBy vs Lodash key By 2" specifically compares these two methods.

**Options compared:**

* **Lodash groupBy**: This method groups an array of objects by a common property (in this case, the `id` property).
* **Lodash keyBy**: This method creates a new object where each value is obtained from the original data using a given function as the "key".

**Pros and Cons:**

* **Lodash groupBy**:
	+ Pros: Simple to implement, easy to understand.
	+ Cons: May not be suitable for large datasets or complex grouping scenarios due to its simplicity.
* **Lodash keyBy**:
	+ Pros: Highly customizable, can handle complex grouping scenarios, and is often more efficient than `groupBy` for large datasets.
	+ Cons: Requires a function as the "key", which may add overhead.

**Library (Lodash) and purpose:**

Lodash is a popular JavaScript utility library that provides various functions for tasks like data manipulation, string manipulation, and more. In this case, Lodash's `groupBy` and `keyBy` functions are used to group data based on specific properties or values.

**Special JS feature or syntax:**

There is no special JavaScript feature or syntax being tested in this benchmark.

**Other alternatives:**

* If you don't want to use a library like Lodash, you could implement the grouping functionality yourself using vanilla JavaScript. This would likely be slower and more error-prone than using a well-tested library like Lodash.
* Another alternative is to use other libraries or frameworks that provide similar grouping functionality, such as Ramda.js or TypeScript's built-in `groupBy` function.

**Benchmark preparation code:**

The provided script preparation code generates an array of 1 million objects with an `id` property, which will be used for the groupBy and keyBy tests. This is likely done to ensure that the benchmarking scenario is reproducible and representative of a real-world use case.

**HTML Preparation Code:**

The HTML preparation code includes the Lodash library (version 4.17.5), which must be loaded before running the benchmarking script.

lodash groupBy vs lodash keyBy 2 (version: 0)

Comparing performance of: `Lodash group vs Lodash key by`

Created: 4 years ago by: Guest

Go to the latest result

Lodash group

Lodash key by

Historical Performance Data aggregated from 11 community runs

Desktop Results:

Chrome 11 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 lodash keyBy 2 (version: 0)

Comparing performance of: Lodash group vs Lodash key by

Created: 4 years ago by: Guest

Go to the latest result

Lodash group

Lodash key by

Historical Performance Data aggregated from 11 community runs

Desktop Results:

Chrome 11 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

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Comparing performance of: `Lodash group vs Lodash key by`