Benchmark: push vs spread vs concat irekk

Tests:

push
const a = [1,2,3]; const b = [4,5,6]; a.push(...b); const c = a;
spread
const a = [1,2,3]; const b = [4,5,6]; const c = [...a, ...b]
concat
const a = [1,2,3]; const b = [4,5,6]; const c = a.concat(b)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
push
spread
concat

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 benchmark data and explain what's being tested.

**Benchmark Definition**

The `benchmark definition` is a string that represents the code snippet to be executed in each test case. It contains three variations of concatenating two arrays:

1. `push`: Using the `push()` method with the spread operator (`...`) to concatenate the arrays.
2. `spread`: Using the spread operator (`...`) to directly concatenate the arrays.
3. `concat`: Using the `concat()` method to concatenate the arrays.

**Options Compared**

In each test case, we have two main options:

* **Push**: Using the `push()` method with the spread operator (`...`) to concatenate the arrays.
* **Spread**: Using the spread operator (`...`) to directly concatenate the arrays.
* **Concat**: Using the `concat()` method to concatenate the arrays.

**Pros and Cons**

Here are some pros and cons of each approach:

1. **Push**:
	* Pros: Fast, lightweight, and concise syntax.
	* Cons: May be less readable for complex concatenations, and can lead to unexpected behavior if not used carefully (e.g., when pushing multiple elements).
2. **Spread**:
	* Pros: More readable than `push` for simple concatenations, and avoids the potential pitfalls mentioned earlier.
	* Cons: Requires JavaScript version support (specifically ES2018+), and may be slower due to the additional overhead of creating a new array.
3. **Concat**:
	* Pros: Well-established and widely supported syntax, with clear performance characteristics.
	* Cons: May be less readable than `push` or `spread`, especially for complex concatenations.

**Libraries and Special JS Features**

None of the provided benchmark code uses any external libraries or special JavaScript features beyond what's already included in the standard library. However, it's worth noting that some browsers may have additional optimizations or nuances when it comes to array concatenation.

**Other Considerations**

When choosing an approach for array concatenation, consider the following factors:

* **Readability**: How readable is the code? Does it clearly convey the intention of concatenating arrays?
* **Performance**: Which approach is faster and more efficient in your specific use case?
* **Version Support**: Are you targeting older browsers or JavaScript versions that may not support certain syntax features?

**Alternatives**

If you're looking for alternative approaches to array concatenation, consider:

1. Using `Array.prototype.reduce()` instead of `concat()`.
2. Utilizing `Array.prototype.set()` with a spread operator (`...`) for more complex scenarios.
3. Employing other libraries or tools that provide optimized array concatenation functions (e.g., `lodash`).

However, keep in mind that the provided benchmark code and results are specifically designed to measure the performance of these three approaches.

Related benchmarks:

push vs spread vs concat irekk (version: 0)

Comparing performance of: push vs spread vs concat

Created: 6 years ago by: Guest

Jump to the latest result

push

spread

concat

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):