Benchmark: spread vs push_____aoeu

Tests:

spread
const a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15] const b = [...a, 16]
push
let a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15] a.push(16)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread
push

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 JavaScript microbenchmarks on MeasureThat.net.

**What is being tested?**

The benchmark is comparing two approaches to add an element to an array: using the spread operator (`...`) and the `push` method.

**Options compared**

There are only two options being compared:

1. **Spread Operator (`...`)**: This approach uses the spread operator to create a new array with the original elements followed by the new element.
2. **Push Method**: This approach uses the `push` method to add an element to the end of the existing array.

**Pros and Cons**

* **Spread Operator (`...`)**:
	+ Pros: Creates a new array, which can be beneficial for large datasets, as it avoids mutating the original array.
	+ Cons: Can be slower than the `push` method due to the overhead of creating a new array.
* **Push Method**:
	+ Pros: Faster and more efficient than the spread operator, as it only needs to modify the existing array.
	+ Cons: Mutates the original array, which can have unintended consequences if the original array is used elsewhere.

**Other considerations**

When deciding between these two approaches, consider the following:

* If you need to preserve the original array and ensure its integrity, use the spread operator.
* If you're working with large datasets and want to optimize performance, use the `push` method.
* If readability and maintainability are more important than raw speed, use the spread operator.

**Library usage**

In this benchmark, there is no explicit library usage. However, some JavaScript implementations might have additional libraries or modules that affect the performance of these operations.

**Special JS features or syntax**

There isn't any special JavaScript feature or syntax used in this benchmark. The focus is solely on comparing two fundamental array manipulation methods.

Now, let's look at an example implementation for the `push` method test case:

```javascript
const a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
a.push(16);
```

And here's an equivalent implementation for the spread operator test case:

```javascript
const a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
const b = [...a, 16];
```

**Other alternatives**

If you're interested in exploring other array manipulation methods or approaches, here are some alternatives:

* **Concatenation**: Using the `concat` method to concatenate two arrays.
```javascript
const a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
const b = [16];
a.concat(b);
```
* **Array.prototype.reduce**: Using the `reduce` method to accumulate elements into a new array.
```javascript
const a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
const b = a.reduce((acc, val) => [...acc, val], []);
b.push(16);
```
These alternatives might offer different trade-offs in terms of performance and readability.

Related benchmarks:

spread vs push_____aoeu (version: 0)

Comparing performance of: spread vs push

Created: 4 years ago by: Guest

Jump to the latest result

spread

push

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):