Benchmark: Spread vs Push -

Tests:

spread
const x = [{a:1},{b:1}]; const y = [{c:3},...x];
push
const x = [{a:1},{b:1}]; const y = [{c:3}]; y.push(x[0]); y.push(x[1]);

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:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.5 Safari/605.1.15

Browser/OS: Safari 18 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
spread	43569344.0 Ops/sec
push	36632172.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to explain what's being tested in the provided JSON benchmark.

**Benchmark Overview**

The benchmark compares two approaches for spreading an array: using the spread operator (`...`) and using the `push` method with multiple calls. The goal is to measure which approach is faster, more efficient, and scalable.

**Options Compared**

There are two options being compared:

1. **Spread Operator (`...`)**: This approach uses the spread operator to create a new array by copying elements from the original array `x`.
2. **Push Method with Multiple Calls**: This approach pushes individual elements from the original array `x` onto the `y` array using multiple calls to the `push` method.

**Pros and Cons of Each Approach**

* **Spread Operator (`...`)**:
	+ Pros: More concise, readable, and efficient way to create a new array.
	+ Cons: Can be slower in certain scenarios due to the overhead of creating a new array object.
* **Push Method with Multiple Calls**: 
	+ Pros: Can be faster in certain scenarios, especially when dealing with large arrays, as it avoids the overhead of creating a new array object.
	+ Cons: More verbose and less readable than the spread operator approach.

**Library Used**

There is no explicit library used in this benchmark. However, it's possible that some built-in JavaScript methods or functions might be optimized to take advantage of certain features, such as array spreads.

**Special JS Feature/Syntax**

The benchmark does not use any special JavaScript features or syntax beyond the basic use of arrays and the spread operator.

**Other Considerations**

When measuring performance, other factors like memory allocation, garbage collection, and caching can also impact results. In this case, it's essential to note that the benchmark is running in a browser environment (Chrome 107) on a desktop platform with macOS 10.15.7.

**Alternatives**

If you're interested in exploring alternative approaches or optimizing your code for performance, consider the following:

* Use `Array.prototype.slice()` or `Array.prototype.splice()` to create new arrays instead of using the spread operator.
* Consider using array buffers or typed arrays for large-scale data processing.
* Optimize your code by reducing unnecessary allocations and minimizing function calls.

Keep in mind that optimizing performance should always be done with a focus on maintainability, readability, and scalability.

Related benchmarks:

Spread vs Push - (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

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