Benchmark: uniqBy vs Set - MeasureThat.net

HTML Preparation code:

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

Script Preparation code:

var files = [];

for (i = 0; i < 1000; i++) {
    files.push({
        documentId: i,
        documentVersionId: i + 1
    });
}

var filesToAdd = [];

for (i = 0; i < 50; i++) {
    filesToAdd.push({
        documentId: i * 2,
        documentVersionId: i + i * 3
    });
}

Tests:

uniqBy
const uniqueDocs = _.uniqBy([...files, ...filesToAdd], 'documentVersionId'); console.log(uniqueDocs.length);
Set
const uniqueDocs = new Set([...files, ...filesToAdd]); console.log(uniqueDocs.size);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
uniqBy
Set

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

Set

36K/s

uniqBy

23K/s

View exact numbers

Test name	Executions per second
✓ Set	35,816 Ops/sec
uniqBy	23,090 Ops/sec

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 JavaScript microbenchmarks.

**Benchmark Overview**

The provided benchmark compares two approaches to remove duplicates from an array of objects based on a specific property (`documentVersionId`). The test consists of two individual tests: `uniqBy` and `Set`.

**Options Compared**

1. **_.uniqBy (Lodash)**:
	* Pros:
		+ Uses a functional programming approach, which can be more concise and expressive.
		+ Lodash is a well-maintained and widely used library with extensive testing.
	* Cons:
		+ Requires an external dependency (Lodash).
		+ May have overhead due to the use of a separate library.
2. **Set**:
	* Pros:
		+ Native JavaScript implementation, no external dependencies required.
		+ Can be optimized for performance by using a specialized data structure (HashSet).
	* Cons:
		+ May require manual implementation of duplicate removal logic.
		+ Less concise and expressive than _.uniqBy.

**Additional Considerations**

* **Performance**: The benchmark shows that `Set` outperforms `_ uniqBy` in this specific test case. However, the performance difference may not be significant for all use cases.
* **Code Readability**: _.uniqBy is generally more readable and maintainable due to its concise and expressive syntax.

**Library Used**

In the provided benchmark, Lodash is used as a dependency to implement `_.uniqBy`. The library provides a `uniqBy` function that takes an array of objects and a property to consider for uniqueness. The function returns an array with only unique elements based on the specified property.

**JavaScript Feature or Syntax (Not Applicable)**

Since neither test case uses any special JavaScript features or syntax, we can ignore this aspect.

**Other Alternatives**

1. **Built-in `filter()` method**: While not as efficient as using a Set, you could use the `filter()` method to remove duplicates from an array.
2. **Manual implementation**: You could implement your own duplicate removal logic using a simple loop or recursion.
3. **Other libraries**: Other JavaScript libraries like Moment.js or Underscore.js might provide similar functionality for removing duplicates.

In summary, while both approaches have their pros and cons, `Set` appears to be the more efficient choice in this specific benchmark. However, _.uniqBy remains a viable option due to its concise syntax and extensive testing.

uniqBy vs Set (version: 0) Benchmark.js

Comparing performance of: `uniqBy vs Set`

Created: 4 years ago by: Guest

Go to the latest result

uniqBy

Set

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

uniqBy vs Set (version: 0) Benchmark.js

Comparing performance of: uniqBy vs Set

Created: 4 years ago by: Guest

Go to the latest result

uniqBy

Set

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: `uniqBy vs Set`