Benchmark: Lodash's uniq vs new Set with length

HTML Preparation code:


<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js'></script>

Tests:

Set
var l = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return (new Set(l)).size > 1;
uniq
var l = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return _.uniq(l).length > 1;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Set
uniq

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark is comparing two approaches to remove duplicates from an array: `lodash uniq` (a popular utility library) and the native JavaScript `Set` data structure.

**Options Compared**

Two options are compared:

1. **Lodash's `uniq`**: A function that removes duplicates from an array while preserving order.
2. **New Set with length check**: A simple approach using the built-in `Set` data structure to remove duplicates, followed by a length check to verify if there were any duplicates present in the original array.

**Pros and Cons**

Here's a brief summary of each approach:

1. **Lodash's `uniq`**:
	* Pros: Fast and efficient, handles edge cases like null/undefined values, and preserves order.
	* Cons: Requires an external library (`lodash`) to be included in the test environment.
2. **New Set with length check**:
	* Pros: Lightweight (no external libraries required), simple implementation, and suitable for most use cases.
	* Cons: May not preserve order like `uniq`, and can be slower if the input array is very large.

**Library and Syntax**

In this benchmark, `lodash` is a popular utility library that provides a wide range of functions for various tasks, including array manipulation. The `uniq` function is specifically designed to remove duplicates from an array while preserving order.

There are no special JavaScript features or syntaxes used in this benchmark, making it accessible to developers with varying levels of expertise.

**Other Alternatives**

If you're interested in exploring alternative approaches to removing duplicates from an array:

* Other libraries like `Array.prototype.filter()` and `Set` (without the length check) can be used.
* If you want to avoid using external libraries, you could implement a custom duplicate removal function using JavaScript's built-in data structures.

Keep in mind that these alternatives might have trade-offs in terms of performance, readability, or edge case handling.

Related benchmarks:

Lodash's uniq vs new Set with length (version: 0)

Comparing performance of: Set vs uniq

Created: 5 years ago by: Guest

Jump to the latest result

Set

uniq

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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