Benchmark: lodash unset vs object 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:

_.unset
_.unset(o, 'a') _.unset(o, 'b')
delete
delete o.a delete o.b

Historical Performance Data aggregated from 37 community runs

Desktop Results:

Chrome 37 runs

delete

13.4M/s

_.unset

4.7M/s

Fastest: delete (2.9x faster)

View exact numbers

✓ delete: 13,415,094 ops/sec
• _.unset: 4,679,326 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.unset
delete

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser/OS: Chrome 137 on Mac OS X 10.15.7

View result in a separate tab

delete

104.6M/s

_.unset

35.8M/s

View exact numbers

Test name	Executions per second
✓ delete	104,573,344 Ops/sec
_.unset	35,798,560 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark is comparing two approaches to remove properties from an object in JavaScript: using the `delete` keyword and using the Lodash library's `_.unset` method.

**Options Compared**

There are two options being compared:

1. **Delete**: This approach uses the `delete` keyword to remove properties from the object. It's a built-in JavaScript feature that allows you to delete properties from an object.
2. **Lodash _.unset**: This approach uses the Lodash library to call the `_.unset` method on the object. The `_.unset` method takes two arguments: the object and the property name.

**Pros and Cons of Each Approach**

1. **Delete**:
	* Pros:
		+ Fast and efficient, as it only updates the internal representation of the object.
		+ Does not require additional dependencies (in this case, Lodash).
	* Cons:
		+ May not work as expected in certain scenarios, such as when the property is a function or a method.
		+ Can be brittle if the object's structure changes.
2. **Lodash _.unset**:
	* Pros:
		+ More robust and less prone to errors, as it checks for existing properties before attempting to remove them.
		+ May work even when using functions or methods as property names.
	* Cons:
		+ Requires the Lodash library to be included in the test environment.
		+ May introduce additional overhead due to the function call.

**Library and Its Purpose**

In this benchmark, the Lodash library is used to provide a consistent way of removing properties from an object. The `_.unset` method takes care of checking for existing properties and handling edge cases, making it a more robust solution than using the `delete` keyword directly.

**Special JavaScript Features or Syntax**

None are mentioned in this benchmark. Both approaches rely on standard JavaScript features (the `delete` keyword and Lodash's internal implementation).

**Other Alternatives**

If you want to compare other approaches for removing properties from an object, some alternatives could be:

1. Using a library like Underscore.js instead of Lodash.
2. Implementing your own custom solution using the `Object.prototype.hasOwnProperty.call` method or other low-level JavaScript techniques.

However, these alternatives would require significant modifications to the benchmark script and might introduce additional complexity.

I hope this explanation helps! Let me know if you have any further questions.

lodash unset vs object delete (version: 0) Benchmark.js

Comparing performance of: `_.unset vs delete`

Created: 8 years ago by: Registered User

Go to the latest result

_.unset

delete

Historical Performance Data aggregated from 37 community runs

Desktop Results:

Chrome 37 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

lodash unset vs object delete (version: 0) Benchmark.js

Comparing performance of: _.unset vs delete

Created: 8 years ago by: Registered User

Go to the latest result

_.unset

delete

Historical Performance Data aggregated from 37 community runs

Desktop Results:

Chrome 37 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `_.unset vs delete`