Benchmark: lodash omit vs spread omit using babel

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 as compiled by babel
function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; } function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; } var a = { aa: 'oh', bb: 'my' }; var aa = a.aa, b = _objectWithoutProperties(a, ["aa"]);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash omit
spread as compiled by babel

Fastest: N/A

Slowest: N/A

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

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Let's break down the provided JSON data to understand what's being tested.

**Benchmark Definition**

The benchmark measures the performance of two approaches:

1. **Lodash `omit`**: This test case uses Lodash, a popular JavaScript utility library, to omit specific keys from an object. The test creates an object `a` with two properties: `aa` and `bb`. It then calls `_omit` function on this object, passing `'aa'` as the excluded key.
2. **Spread operator (compiled by Babel)**: This test case uses the spread operator (`{...}`) to create a new object that excludes specific keys from the original object `a`.

**Options Compared**

The two options being compared are:

1. **Lodash `omit`**: A library-based approach that uses Lodash's implementation of the `omit` function.
2. **Spread operator (compiled by Babel)**: A native JavaScript approach that uses the spread operator to create a new object with omitted keys.

**Pros and Cons**

**Lodash `omit`**

Pros:

* Well-tested and optimized implementation of the `omit` function
* May be faster for large objects due to caching and memoization

Cons:

* Adds an extra dependency on Lodash, which may not be desirable for all projects
* May have a higher memory footprint due to the additional library overhead

**Spread operator (compiled by Babel)**

Pros:

* Native JavaScript implementation with minimal dependencies
* No additional library overhead
* Often faster and more efficient than library-based approaches

Cons:

* May require additional configuration or compilation steps for optimal performance
* Can be less readable or maintainable due to its concise syntax

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions, including `omit`, `map`, `filter`, and many others. Its implementation is highly optimized and tested, making it a reliable choice for many use cases.

**Special JS Feature/Syntax: None mentioned**

There are no special JavaScript features or syntax being used in these test cases.

**Other Alternatives**

For the `omit` function, other alternatives include:

* Using a custom implementation in JavaScript
* Using a different library (e.g., Underscore.js)
* Using a functional programming approach with higher-order functions

For the spread operator, other alternatives include:

* Using a different syntax (e.g., `Object.assign()` or `Array.prototype.slice()`)
* Compiling the spread operator to a native JavaScript implementation using tools like Babel
* Using a library-based approach (e.g., Lodash's `omit` function)

In general, the choice of approach depends on the specific use case, performance requirements, and personal preference.

Related benchmarks:

lodash omit vs spread omit using babel (version: 0)

Comparing performance of: lodash omit vs spread as compiled by babel

Created: 6 years ago by: Guest

Jump to the latest result

lodash omit

spread as compiled by babel

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):