Benchmark: lodash-uniqueid-vs-string-concat

HTML Preparation code:

<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js'></script>

Script Preparation code:

var value = _.times(1000000).map(x => ({ a: '0123456789abcdef', b: '0123456789abcdef' }));

Tests:

Lodash
_.each(value, function(v,i) { v.c = _.uniqueId() })
Native
_.each(value, function(v,i) { v.c = v.a + ':' + v.b })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash
Native

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

I'd be happy to explain the benchmark and its results.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark test case named "lodash-uniqueid-vs-string-concat". The benchmark compares two approaches: using the Lodash library's `uniqueId()` function versus concatenating strings manually (native approach).

**Options Compared**

Two options are compared:

1. **Lodash (`_.uniqueId()`)**: This approach uses the Lodash library to generate a unique identifier for each object in the array.
2. **Native (Concatenation)**: This approach manually concatenates two strings ("a" and "b") to create a unique identifier.

**Pros and Cons**

Here are some pros and cons of each approach:

* **Lodash (`_.uniqueId()`)**
	+ Pros:
		- More concise code
		- Less chance of human error (e.g., typos)
	+ Cons:
		- Adds an external dependency (Lodash library)
		- May have performance overhead due to the additional library load and potential caching issues
* **Native (Concatenation)**
	+ Pros:
		- No external dependencies, reducing performance overhead
		- More control over generated identifiers
	+ Cons:
		- More verbose code
		- Higher chance of human error (e.g., typos)

**Library Used**

In this benchmark, the Lodash library is used for its `uniqueId()` function. The library's purpose is to provide a set of functional programming utilities, including functions for working with arrays and objects.

**Special JavaScript Features or Syntax**

None are mentioned in this specific benchmark case. However, some common features like `let`/`const` declarations, arrow functions, or template literals (used in the HTML preparation code) are widely supported across modern browsers.

**Other Alternatives**

In general, other alternatives for generating unique identifiers include:

* Using a UUID library (e.g., crypto.randomUUID() in JavaScript)
* Implementing a custom algorithm
* Using a hashing function with a fixed seed value

The choice of alternative depends on the specific requirements and constraints of your project.

I hope this explanation helps!

Related benchmarks:

lodash-uniqueid-vs-string-concat (version: 0)

Test

Comparing performance of: Lodash vs Native

Created: 3 years ago by: Registered User

Jump to the latest result

Lodash

Native

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):