Benchmark: lodash omit vs filter

HTML Preparation code:

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

Tests:

omit
const foo = ['field1', 'field2', 'field3', 'field4', 'field5']; _.omit(foo, nextField => nextField === 'field4');
filter
const foo = ['field1', 'field2', 'field3', 'field4', 'field5']; _.filter(foo, nextField => nextField !== 'field4');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
omit
filter

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Linux

View result in a separate tab

Test name	Executions per second
omit	486989.3 Ops/sec
filter	3170910.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what is being tested on the provided JSON.

**Benchmark Definition**
The benchmark is defined by two test cases, "filter" and "omit", which compare the performance of two methods in the Lodash library: `_.omit` and `_filter`.

**Options Compared**

In this benchmark, the following options are compared:

1. **_.omit**: Removes specified fields from an array.
2. **_.filter**: Creates a new array with only the elements that pass a test implemented by the provided function.

**Pros and Cons of Each Approach**

* **_.omit**: This approach is generally faster because it only needs to create a new array with the desired fields removed, whereas `_filter` creates a new array and then iterates over it. However, if the input array is small, the overhead of creating a new array might outweigh the speed benefit.
* **_.filter**: This approach can be more intuitive for developers familiar with JavaScript's `Array.prototype.filter()` method. However, as mentioned earlier, it has an additional overhead due to the iteration and creation of a new array.

**Library: Lodash**
Lodash is a popular JavaScript library that provides various utility functions, including those used in this benchmark (e.g., `_omit`, `_filter`). It aims to provide a comprehensive set of functions for common programming tasks.

**Special JS Feature/Syntax**
There is no special JavaScript feature or syntax being tested in this benchmark. The code only uses standard JavaScript and Lodash library functions.

**Other Alternatives**

If you wanted to compare the performance of other methods, here are some alternatives:

* **Manual Array Iteration**: Instead of using `_omit` or `_filter`, developers could manually iterate over the input array and create a new array with the desired fields removed.
* **Array.prototype.forEach()**: Similar to manual iteration, but uses `forEach()` instead.

Keep in mind that these alternatives would likely be slower than using Lodash's optimized `_omit` and `_filter` functions.

Related benchmarks:

lodash omit vs filter (version: 0)

Comparing performance of: omit vs filter

Created: 5 years ago by: Guest

Jump to the latest result

omit

filter

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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