Benchmark: Foobarbazfarbazfoobar

Script Preparation code:

var data = {
    freeItemsInCart: ['foo', 'bar']
}

Tests:

1
const copy = Object.assign({}, data); delete copy.freeItemsInCart[1]
2
const copy = Object.assign({}, data); const successor = copy.freeItemsInCart.filter(item => item != 'foo'); const updated = { freeItemInCart: successor }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1
2

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.

Let's dive into the world of MeasureThat.net and explore what's being tested in this benchmark.

**Benchmark Definition**

The benchmark definition is a JSON object that contains metadata about the test case. In this case, we have:

* `Name`: A descriptive name for the benchmark ("Foobarbazfarbazfoobar").
* `Description`: An empty string, which suggests that there isn't a detailed description of what's being tested.
* `Script Preparation Code` and `Html Preparation Code`: These are code snippets that are executed before running the actual test. In this case, we have a JavaScript script that defines an object `data` with a single property `freeItemsInCart`, which contains two strings ("foo" and "bar").

**Individual Test Cases**

The benchmark has two test cases:

1. **Test Case 1**
	* `Benchmark Definition`: A JavaScript code snippet that creates a copy of the `data` object using `Object.assign()`, deletes the second element of the `freeItemsInCart` array, and assigns it to a variable named `copy`.
2. **Test Case 2**
	* `Benchmark Definition`: Another JavaScript code snippet that creates a copy of the `data` object using `Object.assign()`, filters out the "foo" item from the `freeItemsInCart` array using the `filter()` method, and assigns it to a variable named `successor`. Then, it creates an updated object with a single property `freeItemInCart` set to the filtered array.

**Options Being Compared**

It appears that MeasureThat.net is comparing two different approaches:

1. **Test Case 1**: Uses the `delete` operator to remove the second element of the `freeItemsInCart` array.
2. **Test Case 2**: Uses the `filter()` method to create a new array with only the "bar" item.

**Pros and Cons of Each Approach**

* **Test Case 1**:
	+ Pros: Simple, lightweight, and easy to understand.
	+ Cons: May not be as efficient as using `filter()`, especially for larger arrays.
* **Test Case 2**:
	+ Pros: More concise and expressive than the `delete` operator.
	+ Cons: Requires understanding of the `filter()` method and its behavior.

**Library Used**

The `Object.assign()` function is used in both test cases, which is a part of the JavaScript Standard Library. It's a built-in function that creates a shallow copy of an object.

**Special JS Features or Syntax**

There are no special features or syntax used in these test cases. They only utilize standard JavaScript constructs and operators.

**Other Considerations**

When running benchmarks like this, it's essential to consider factors such as:

* Cache behavior: Does the browser cache the results of `Object.assign()`?
* Array size and performance: How do the two approaches affect performance when dealing with large arrays?

**Alternatives**

If you were to create a similar benchmark for other JavaScript features or libraries, some alternatives might include:

* Using a different approach to manipulate arrays, such as using `splice()` or `map()`.
* Including additional metadata in the benchmark definition, such as information about the array size or data distribution.
* Using a different type of test case, such as one that focuses on caching behavior or memory allocation.

Overall, this benchmark provides a simple yet useful example of how JavaScript objects can be manipulated using various approaches. By comparing these two methods, we can gain insights into their performance and trade-offs.

Related benchmarks:

Foobarbazfarbazfoobar (version: 0)

Comparing performance of: 1 vs 2

Created: 3 years ago by: Guest

Jump to the latest result

1

2

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):