Benchmark: $.extend() recursivity performance test

HTML Preparation code:

<script src="https://code.jquery.com/jquery-2.2.3.min.js"></script>

Tests:

Without Recursivity
var obj1a = {"a": 1, "b": {"a": 1, "b": {"a": 1, "b": {"a": 1, "b": 1}}}} var obj2a = $.extend({}, obj1a)
With Recursivity
var obj1b = {"a": 1, "b": {"a": 1, "b": {"a": 1, "b": {"a": 1, "b": 1}}}} var obj2b = $.extend(true, {}, obj2b)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Without Recursivity
With Recursivity

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the provided benchmarking scenario.

**What is being tested?**

The benchmark tests the performance of jQuery's `$.extend()` method with and without recursivity, when the recursivity isn't needed. The test cases create objects with nested structures and measure how long it takes to merge these objects using `$.extend()`.

**Options compared:**

Two options are compared:

1. **Without Recursivity**: This approach uses a simple iterative loop to merge the objects, without recursively traversing the nested structures.
2. **With Recursivity**: This approach uses jQuery's built-in recursion to merge the objects, which means that when an object has a property with another object as its value, the function will recursively call itself on that inner object.

**Pros and Cons:**

* **Without Recursivity**:
	+ Pros: Can be faster for smaller datasets or when the recursion depth is not too high.
	+ Cons: May cause stack overflow errors if the dataset is too deep or large.
* **With Recursivity**:
	+ Pros: Handles deeply nested structures more efficiently, as it leverages JavaScript's recursive capabilities.
	+ Cons: Can be slower for smaller datasets and may consume more memory due to the recursive function calls.

**Library used:**

The benchmark uses jQuery library, which is a popular JavaScript library for DOM manipulation and event handling. The `$.extend()` method is used to merge objects, and it's likely that this method leverages the built-in recursivity approach.

**Special JS feature or syntax:**

There is no special JavaScript feature or syntax mentioned in the provided benchmarking scenario. However, it's worth noting that modern JavaScript engines like V8 (used by Chrome) have optimized `$.extend()` for performance, which might affect the results of this benchmark.

**Other alternatives:**

If you were to implement a custom solution without using jQuery, you could consider using:

1. Iterative approach: Use a simple loop to merge objects, as done in the "Without Recursivity" option.
2. Recursive approach: Implement your own recursive function to handle nested structures, similar to the "With Recursivity" option.

Keep in mind that implementing a custom solution would likely require more code and expertise than using jQuery's optimized `$.extend()` method.

Related benchmarks:

$.extend() recursivity performance test (version: 0)

Compare $.extend with and without recursivity when the recursivity isn't needed

Comparing performance of: Without Recursivity vs With Recursivity

Created: 3 years ago by: Guest

Jump to the latest result

Without Recursivity

With Recursivity

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):