Benchmark: Spread vs Foreach 10

Tests:

1
let documents = [{ imageData: 1 }, { imageData: 2 }]; let images = []; (images = documents.map((document) => { return document.imageData; }));
2
let documents = [{ imageData: 1 }, { imageData: 2 }]; let images = []; documents.forEach(document => { const image = document.imageData; images.push(image); });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1
2

Fastest: N/A

Slowest: N/A

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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 benchmark definition and test cases to understand what is being tested.

**Benchmark Definition:**

The benchmark definition provides two scripts, which are essentially JavaScript functions that perform different operations on an array of objects. The goal is to compare the performance of these two approaches:

1. `Spread vs Foreach 10`: This script uses both the spread operator (`...`) and a `forEach` loop to extract image data from an array of documents.
2. `Foreach 10`: This script only uses a `forEach` loop to extract image data from an array of documents.

**Options Compared:**

The two options being compared are:

* Using the spread operator (`...`) to create a new array with extracted values
* Using a `forEach` loop to iterate over the array and push values to a new array

**Pros and Cons:**

1. **Spread Operator ( ... ):**
	* Pros:
		+ More concise and expressive code
		+ Creates a new array without mutating the original one
	* Cons:
		+ May incur additional overhead due to array creation
		+ Can be slower for large arrays if the JavaScript engine is not optimized for this operation
2. **Foreach Loop:**
	* Pros:
		+ More traditional and familiar loop structure
		+ Often faster for loops due to the engine's optimization
	* Cons:
		+ More verbose code
		+ May involve more memory allocation and deallocation, leading to performance issues

**Library and Purpose:**

In both test cases, there is no explicit library being used. However, it's worth noting that some JavaScript engines might provide intrinsic functions or optimizations for certain operations, which could affect the performance of these benchmarks.

**Special JS Features/Syntax:**

There are no special JS features or syntax being tested in these benchmarks. The focus is solely on the performance comparison between two common programming approaches.

**Other Alternatives:**

Some alternative approaches to achieve similar results might include:

* Using `map()` instead of `forEach()`
* Using a `for` loop with an index variable
* Using a library like Lodash or Ramda for functional programming

However, these alternatives are not explicitly tested in this benchmark.

**Benchmark Preparation Code:**

The provided script preparation code is empty, which means the benchmark can use any JavaScript environment and engine. If additional configuration or setup were required, it would need to be specified elsewhere.

In summary, this benchmark tests the performance of two approaches for extracting values from an array using either the spread operator or a `forEach` loop.

Related benchmarks:

Spread vs Foreach 10 (version: 0)

Comparing performance of: 1 vs 2

Created: 4 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):