Benchmark: lodash unset vs lodash omit vs native delete

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

var o = {a:1,b:2,c:3,d:4}

Tests:

_.omit
o = _.omit(o, ['a', 'b'])
_.unset
_.unset(o, ['a', 'b'])
delete
delete o.a delete o.b

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.omit
_.unset
delete

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared, and their pros and cons.

**What is tested?**

The benchmark compares three approaches to remove or delete properties from an object:

1. **Native `delete` operator**: Directly deletes a property using the `delete` keyword.
2. **Lodash `_unset` function**: Uses Lodash's `_unset` function to remove a property from an object.
3. **Lodash `_omit` function**: Uses Lodash's `_omit` function to create a new object with certain properties removed.

**Comparison options**

The benchmark compares the performance of these three approaches across different test cases.

* `_.omit` vs `_.unset`: This comparison tests how efficient each approach is when removing multiple properties from an object.
* Each individual approach (Native `delete`, Lodash `_unset`, and Lodash `_omit`) is tested separately to compare their execution times.

**Pros and cons of each approach:**

1. **Native `delete` operator**:
	* Pros:
		+ Fastest way to delete a property, as it directly modifies the object's internal state.
		+ No additional function calls or overhead from Lodash.
	* Cons:
		+ Can be brittle if the property name changes, as it relies on the internal implementation of the object.
		+ Not suitable for removing multiple properties at once.
2. **Lodash `_unset` function**:
	* Pros:
		+ Portable and reliable, as Lodash's implementation is well-documented and maintained.
		+ Can remove multiple properties in a single call.
	* Cons:
		+ Slightly slower than the native `delete` operator due to the additional function call overhead.
		+ May require additional setup or imports for certain environments.
3. **Lodash `_omit` function**:
	* Pros:
		+ Similar to `_unset`, but creates a new object with the desired properties removed, rather than modifying the original object.
		+ Can be useful when preserving the original object's state.
	* Cons:
		+ Slightly slower than the native `delete` operator due to the additional function call overhead and creation of a new object.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides various functions for working with arrays, objects, and more. The `_unset` and `_omit` functions are part of Lodash's object manipulation suite, providing convenient ways to remove properties from objects or create new objects with specific properties removed.

**Special JS feature: None**

There are no special JavaScript features or syntaxes being tested in this benchmark.

**Other alternatives**

If you're looking for alternative approaches to removing properties from objects, some other options include:

* Using the `Object.prototype.hasOwnProperty.call()` method to check if a property exists before deleting it.
* Creating a custom function to remove properties using a loop and conditional statements.
* Utilizing a library like Underscore.js or Ramda, which provide similar functions for object manipulation.

Keep in mind that these alternatives may have different performance characteristics, trade-offs, or use cases compared to the native `delete` operator, Lodash `_unset`, and Lodash `_omit`.

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 Edg/121.0.0.0

Browser/OS: Chrome 121 on Windows

View result in a separate tab

Test name	Executions per second
_.omit	755835.8 Ops/sec
_.unset	3174428.2 Ops/sec
delete	3625098.2 Ops/sec

Related benchmarks:

lodash unset vs lodash omit vs native delete (version: 0)

Comparing performance of: _.omit vs _.unset vs delete

Created: 10 months ago by: Guest

Jump to the latest result

_.omit

_.unset

delete

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):