Benchmark: lodash.size vs lodash.keys

HTML Preparation code:

https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js

Script Preparation code:

var collection = {a: 30310, b: 100303, c: 3040494};

Tests:

lodash.size
_.size(collection)
lodash.keys
_.keys(collection)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash.size
lodash.keys

Fastest: N/A

Slowest: N/A

Autogenerated LLM Sumamry (model llama3.2:3b, generated 4 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON data and explain what's being tested, the options compared, their pros and cons, and other considerations.

**Benchmark Definition**
The benchmark definition is a set of two test cases that compare the performance of two functions from the Lodash library:

1. `_.size(collection)`: Returns the number of elements in the given collection (in this case, an object).
2. `_.keys(collection)`: Returns an array of the keys in the given collection.

**Options Compared**
The two options being compared are:

1. `lodash.size`
2. `lodash.keys`

Both functions return values related to the input collection, but they have different characteristics:

* `_.size` returns a number, which is likely faster and more memory-efficient than returning an array.
* `_.keys` returns an array of strings, which may be slower due to the overhead of creating and manipulating arrays.

**Pros and Cons**

* **_.size**: Pros:
	+ Faster execution
	+ More memory-efficient
	Cons:
	+ Returns a single number, whereas `_.keys` returns an array
* **_.keys**: Pros:
	+ Returns an array that can be easily iterated over or manipulated
	Cons:
	+ Slower execution due to array creation and manipulation

**Library: Lodash**
Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as data manipulation, functional programming, and more. In this benchmark, we're using the `lodash` library version 4.17.15.

**Special JS Feature/Syntax**
None mentioned in this specific benchmark. However, it's worth noting that Lodash uses various ES6+ features, such as arrow functions, template literals, and classes, which are not explicitly mentioned here but might be used behind the scenes.

**Alternative Approaches**
If you were to reimplement these benchmarks without using a library like Lodash, you could consider:

* Using built-in JavaScript methods (e.g., `Object.keys()` for `_.keys`) or functions (e.g., `Array.prototype.length` for `_.size`)
* Implementing your own custom functions to measure the performance of iteration and array creation
* Using a different library that provides similar functionality

Keep in mind that using a dedicated library like Lodash can simplify your code and provide benefits like caching, memoization, and parallel execution. However, if you're looking to optimize specific use cases or understand the underlying algorithms, you may want to explore alternative approaches.

In summary, this benchmark compares the performance of two Lodash functions: `_.size` (fast but returns a single number) versus `_.keys` (slower but returns an array). The results will help users understand which approach is best suited for their specific use case.

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Safari/537.36

Browser/OS: Chrome 79 on Windows

View result in a separate tab

Test name	Executions per second
lodash.size	2907984.0 Ops/sec
lodash.keys	3250919.0 Ops/sec

Related benchmarks:

lodash.size vs lodash.keys (version: 0)

Comparing performance of: lodash.size vs lodash.keys

Created: 4 years ago by: Guest

Jump to the latest result

lodash.size

lodash.keys

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Sumamry (model llama3.2:3b, generated 4 days ago):