Benchmark: lodash omit versus spread omit

HTML Preparation code:

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

Tests:

lodash omit
const a = { aa: 'oh', bb: 'my' }; const b = _.omit(a, 'aa');
spread omit
const a = { aa: 'oh', bb: 'my' }; const { aa, ...b } = a;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash omit
spread omit

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 dive into explaining the JavaScript microbenchmark on MeasureThat.net.

**What is being tested?**

The benchmark tests two approaches for removing properties from an object in JavaScript:

1. Using the `_.omit` function from the Lodash library.
2. Using the spread operator (`...`) to create a new object with only some of the original object's properties.

**Options compared**

Two options are compared:

* **Lodash _.omit**: This function takes two arguments: an object and a string or array of strings representing the property names to be omitted from the object.
* **Spread operator (`...`)**: This operator creates a new object with all the same own enumerable properties as the original object, but only includes the specified properties.

**Pros and Cons**

**Lodash _.omit**

Pros:

* Easy to use: simply pass in the object and property names to omit.
* Fast execution speed (due to optimized C code under the hood).

Cons:

* Requires including an additional library dependency (Lodash).
* May be overkill for simple cases, adding unnecessary overhead.

**Spread operator (`...`)**

Pros:

* Lightweight and efficient: no additional library dependencies required.
* Can be used with any JavaScript object type (not just objects with own enumerable properties).

Cons:

* Requires understanding of the spread operator syntax.
* May be slower than Lodash _.omit for complex property removal cases.

**Other considerations**

When using the spread operator, keep in mind that it creates a new object, which can have performance implications if dealing with large datasets. Additionally, if the original object has circular references or other complexities, the spread operator may not produce the expected results.

**Library: Lodash _.omit**

Lodash is a popular JavaScript utility library that provides various functions for tasks like data manipulation, string formatting, and more. `_.omit` is one of its most frequently used functions, allowing developers to easily remove properties from objects without having to write custom code.

**Special JS feature: ES6 spread operator (`...`)**

The spread operator was introduced in ECMAScript 2015 (ES6) as a new way to create a copy of an object. It allows you to "spread" the properties of one object into another, creating a new object with only the desired properties.

In summary, MeasureThat.net's benchmark compares two approaches for removing properties from objects: Lodash _.omit and the spread operator (`...`). While both methods have their advantages and disadvantages, the choice ultimately depends on your specific use case, personal preference, and performance requirements.

Related benchmarks:

lodash omit versus spread omit (version: 0)

Comparing performance of: lodash omit vs spread omit

Created: 6 years ago by: Guest

Jump to the latest result

lodash omit

spread omit

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):