Benchmark: Lodash uniq vs Object keys unique

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
<script>
Array.prototype.uniqueString = function() {
    let tmpObj = {};
    for (var i = 0; i < this.length; i++) {
        tmpObj[this[i]] = this[i];
    }
    return Object.values(tmpObj);
}
</script>

Script Preparation code:


var arr = ['Jane', 'Bob', 'Kat', 'Kat', 'Bob', 'Jane', 'Ian', 'Jane', 'Bob', 'Kat', 'Kat', 'Bob', 'Jane', 'Ian'];

Tests:

Lodash uniq
var result = _.uniq(arr);
Object keys unique
var result = arr.uniqueString();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash uniq
Object keys unique

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the benchmark test cases.

**Benchmark Definition JSON**

The provided JSON defines two benchmark test cases: `Lodash uniq` and `Object keys unique`. The `Script Preparation Code` section contains the initial JavaScript array `arr`, which is used in both test cases. The `Html Preparation Code` section includes a reference to the Lodash library, which is used in the `Lodash uniq` test case.

**Test Cases**

The two test cases are:

1. **Lodash uniq**: This test case uses the `_.uniq()` function from the Lodash library to remove duplicate elements from the array `arr`. The benchmark measures the execution time of this function.
2. **Object keys unique**: This test case defines a custom JavaScript function `uniqueString()` that returns an array of unique strings from the original array `arr`. The benchmark measures the execution time of this function.

**Options compared**

The two test cases compare the performance of:

1. Using the `_.uniq()` function from Lodash to remove duplicates from an array.
2. Implementing a custom JavaScript function to achieve the same result (removing duplicates and returning unique strings).

**Pros and Cons**

Here are some pros and cons of each approach:

**Lodash uniq**

Pros:

* Faster execution time: The `_.uniq()` function is optimized for performance and is likely to be faster than a custom implementation.
* Easier to implement: Using an existing library like Lodash can simplify the development process.

Cons:

* Dependence on external library: The benchmark measures the execution time of the `_.uniq()` function, which means it's tied to the performance of the Lodash library.
* Limited control: When using a third-party library, developers may have limited control over the implementation details.

**Object keys unique**

Pros:

* Control and flexibility: By implementing a custom function, developers can fine-tune the algorithm and optimize it for specific use cases.
* No external dependencies: The benchmark measures the execution time of the custom function, which means it's not dependent on any external library.

Cons:

* More complex implementation: Writing a custom function to achieve the same result as Lodash uniq requires more development effort and expertise.
* Potential performance overhead: Depending on the implementation, the custom function might be slower than the optimized `_.uniq()` function.

**Library: Lodash**

Lodash is a popular JavaScript library that provides various utility functions for tasks like array manipulation, string manipulation, and more. The `_.uniq()` function is part of this library and is designed to efficiently remove duplicates from arrays while preserving order.

**Special JS feature or syntax**

There are no special JavaScript features or syntax used in these test cases. However, if you're interested in exploring other alternatives, some options include:

* **ES6 Set data structure**: You can use the `Set` data structure to remove duplicates from an array.
* **Custom implementation using a hash table**: Implementing a custom function using a hash table can provide better performance and control over the algorithm.

Keep in mind that these alternatives might require more development effort and expertise, but they can offer more flexibility and control over the implementation details.

Related benchmarks:

Lodash uniq vs Object keys unique (version: 0)

Comparing performance of: Lodash uniq vs Object keys unique

Created: 6 years ago by: Guest

Jump to the latest result

Lodash uniq

Object keys unique

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):