Benchmark: Comparing performance of: _.uniqWith vs native impl

HTML Preparation code:

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

Script Preparation code:

function _uniqTxes(newSelectedModelList) {
  return newSelectedModelList.filter(function({ txid }, key) {
    return !this.has((key = txid)) && this.add(key);
  }, new Set());
}

// Build random data set with duplicates 
function randomChar() {
    return 'abcdefghijklmnopqrstuvwxyz'.charAt(Math.floor(Math.random() * 26));
}

var data = [];
for (var i = 0; i < 50000; i++) {
    data.push ({
        txid: randomChar() + randomChar() +randomChar()
    });
}

Tests:

imp
_uniqTxes(data)
lodash
_.uniqWith(data, (a, b) => a.txid === b.txid);

Historical Performance Data aggregated from 12 community runs

Desktop Results:

Chrome 12 runs

imp

425/s

lodash

1/s

Fastest: imp (560.0x faster)

View exact numbers

✓ imp: 425 ops/sec
• lodash: 1 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
imp
lodash

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0

Browser/OS: Firefox 136 on Windows

View result in a separate tab

imp

540/s

lodash

0/s

View exact numbers

Test name	Executions per second
✓ imp	540 Ops/sec
lodash	0 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 benchmark and explain what's being tested, compared, and some pros/cons of each approach.

**Benchmark Definition**

The benchmark is comparing the performance of two approaches to remove duplicates from an array:

1. **Native Implementation**: `_uniqTxes` function (test case "imp")
2. **Lodash Implementation**: Using the `_.uniqWith` function with a custom comparison function (test case "lodash")

**What's being tested?**

The benchmark is testing how fast each implementation can filter out duplicates from the array. The array contains 50,000 objects with randomly generated IDs (txids).

**Options Compared**

The two options are compared:

1. **Native Implementation**: `_uniqTxes` function, which uses a combination of `filter` and `has`, `add`, and `Set` methods to remove duplicates.
2. **Lodash Implementation**: Using the `_.uniqWith` function with a custom comparison function `(a, b) => a.txid === b.txid`. This function is part of the Lodash library.

**Pros/Cons of each approach**

1. **Native Implementation** ( `_uniqTxes` function ):
	* Pros:
		+ No external dependencies required.
		+ Can be optimized for performance using techniques like caching and memoization.
	* Cons:
		+ More verbose code compared to Lodash implementation.
		+ Requires manual management of the `Set` data structure.
2. **Lodash Implementation** (using `_.uniqWith`):
	* Pros:
		+ Concise and readable code.
		+ Built-in support for various comparison functions, reducing boilerplate code.
	* Cons:
		+ External dependency on Lodash library.
		+ May have slower performance due to the overhead of calling a function.

**Library Used**

In this benchmark, the `lodash` library is used. Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like string manipulation, array processing, and more. The `_.uniqWith` function is part of Lodash's `MoreUtils` module, which provides additional functional programming helpers.

**Special JS Feature/Syntax**

There isn't any special JavaScript feature or syntax used in this benchmark that requires explanation beyond the basic usage of arrays, objects, and functions.

Comparing performance of: _.uniqWith vs native impl (version: 4) Benchmark.js

Comparing performance of: `imp vs lodash`

Created: 7 years ago by: Registered User

Go to the latest result

imp

lodash

Historical Performance Data aggregated from 12 community runs

Desktop Results:

Chrome 12 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Comparing performance of: _.uniqWith vs native impl (version: 4) Benchmark.js

Comparing performance of: imp vs lodash

Created: 7 years ago by: Registered User

Go to the latest result

imp

lodash

Historical Performance Data aggregated from 12 community runs

Desktop Results:

Chrome 12 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: `imp vs lodash`