Benchmark: ES2019 Omit versus _.omit lodash

HTML Preparation code:

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

Script Preparation code:

var obj = {a: {b: {c: {d: 1}}}}
var badObj = {}

Tests:

es2019
const obj = { a: 1, b: 1, c: 1, d: 1, e: 1, f: 1, }; const { a, d, c, ...rest } = obj;
Lodash
const obj = { a: 1, b: 1, c: 1, d: 1, e: 1, f: 1, }; _.omit(obj, ['a', 'd', 'c']);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
es2019
Lodash

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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The provided benchmark definition is testing two approaches to removing properties from an object: the ES2019 "rest" syntax and Lodash's `_.omit` function.

**ES2019 "Rest" Syntax**

In this approach, we're using the new "rest" syntax (introduced in ES2015, but gaining popularity since ES2019) to destructure the object. We define an object `obj` with multiple properties, and then use destructuring assignment to extract only certain properties into separate variables (`a`, `d`, and `c`) while discarding the rest of the properties.

The benefits of this approach are:

*   Lightweight: This method is relatively simple and doesn't require any additional libraries.
*   Fast: Since it's a built-in feature, it should be just as fast as using Lodash's `_omit`.

However, there are some potential drawbacks to consider:

*   Compatibility: As the syntax was introduced in ES2015, older browsers or environments might not support it out of the box.
*   Clarity: Depending on the context and complexity of your codebase, this method may be less readable than using a more explicit library.

**Lodash's `_omit` Function**

In contrast, Lodash's `_omit` function takes an object and an array of properties to remove. This approach requires including the Lodash library in your test script.

The benefits of this approach are:

*   Flexibility: By removing any number of properties from the object using a simple API, you can make it more reusable across various use cases.
*   Well-documented: As part of the popular Lodash library, this function is well-maintained and widely recognized by developers.

However, there are some potential drawbacks to consider:

*   Weight: You'll need to include an additional library in your test script, which can be a minor overhead.
*   Dependence on external libraries: If you're not prepared for potential issues with compatibility or versioning, this method requires Lodash to work properly.

**Other Considerations**

*   Browser performance differences might arise due to the inclusion of an extra JavaScript file (Lodash) in the test script. This could have minor performance implications.
*   In some cases, you may need to use multiple libraries together if they offer complementary functionality.

**Library and Special JS Features Used**

*   Lodash is a popular utility library for functional programming tasks.
*   No special JavaScript features or syntax are explicitly mentioned in the benchmark definition.

Related benchmarks:

ES2019 Omit versus _.omit lodash (version: 0)

Comparing performance of: es2019 vs Lodash

Created: 5 years ago by: Guest

Jump to the latest result

es2019

Lodash

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):