Benchmark: Lodash omit Vs. es6 rest spread random keys

HTML Preparation code:

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

Script Preparation code:

var n = 10000;
var o = {};

while (n) {
  o["entry"+ n] = true;
  n--;  
}

Tests:

Lodash Omit
_.omit(o, "entry1", "entry2", "entry3", "entry4444", "entry5", "entry6", "entry7777", "entry8", "entry9999", "entry1000");
ES6 spread
const {entry1, entry2, entry3, entry4444, entry5, entry6, entry7777, entry8, entry9999, entry1000, ...props} = o;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash Omit
ES6 spread

Fastest: N/A

Slowest: N/A

Latest run results:

No previous 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 dive into the world of MeasureThat.net and analyze the provided benchmark.

**Benchmark Definition JSON**

The first part, `{"Name": "Lodash omit Vs. es6 rest spread random keys"`, explains that this is a comparison between two approaches:

1. **Lodash Omit**: Using the Lodash library to remove specific keys from an object (`_.omit(o, ...)`).
2. **ES6 Spread (Rest)**: Using JavaScript's built-in feature of spreading an object into multiple variables using the rest syntax (`const {entry1, entry2, ...} = o;`).

**Benchmark Preparation Code**

The script preparation code creates a large object `o` with 10,000 properties and randomly assigns a value to each property. This is done using a `while` loop that decrements a counter `n`, assigning the string `"entry"+ n` as a key in the object.

**Html Preparation Code**

This line includes the Lodash library from a CDN, making it available for use in the benchmark.

**Individual Test Cases**

The two test cases are:

1. **Lodash Omit**: Runs the `_.omit(o, ...)` function with an array of 10 keys to remove from the object.
2. **ES6 Spread (Rest)**: Uses destructuring assignment to extract specific properties from the object into separate variables.

**Pros and Cons**

**Lodash Omit**

Pros:

* Easy to use and understand, especially for developers familiar with Lodash.
* Works well for small to medium-sized objects.

Cons:

* Requires an additional library download (Lodash) which may slow down the benchmark.
* May have performance overhead due to the function call and object lookup.

**ES6 Spread (Rest)**

Pros:

* Built-in feature, no additional library needed.
* Can be more efficient since it avoids the function call overhead.

Cons:

* May require more time and effort to set up, especially for large objects.
* Less readable and maintainable code compared to Lodash Omit.

**Library: Lodash**

Lodash is a popular utility library for JavaScript that provides various functions for tasks like array manipulation, object creation, and more. In this benchmark, Lodash is used for the `_.omit()` function, which removes specified properties from an object.

**Special JS Feature: ES6 Spread (Rest)**

The ES6 spread syntax (`const {entry1, entry2, ...} = o;`) allows extracting multiple values from an object into separate variables. This feature was introduced in ECMAScript 2015 and is commonly used for destructuring assignment.

Now that we've analyzed the benchmark, here are some other alternatives you might consider:

* **Manual Loops**: Instead of using Lodash or ES6 spread, a manual loop could be used to remove properties from an object. This would eliminate the need for libraries but may be slower and less readable.
* **Object.create()**: Another approach is to use `Object.create()` to create a new object with only the desired properties removed.
* **Custom implementation**: Depending on the specific requirements, you might want to implement your own solution using bitwise operations or other techniques.

Keep in mind that these alternatives may not be as efficient or readable as the original benchmark.

Related benchmarks:

Lodash omit Vs. es6 rest spread random keys (version: 0)

Comparing performance of: Lodash Omit vs ES6 spread

Created: 4 years ago by: Guest

Jump to the latest result

Lodash Omit

ES6 spread

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):