Benchmark: Push Shift vs Pop Spread.

Tests:

Push shift
const a = [1, 2, 3, 4, 5]; a.push(6); a.shift();
Pop Spread
let a = [1, 2, 3, 4, 5]; a = [6, ...a]; a.pop();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Push shift
Pop Spread

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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Measuring performance differences in JavaScript microbenchmarks can be a complex task, as it involves understanding various aspects of the language and its implementations.

The provided benchmark measures the performance difference between two approaches: using `push()` followed by `shift()`, and using the spread operator (`...`) to achieve the same result. Let's break down what's being tested:

**Push Shift vs Pop Spread**

* The first approach uses `push()` to add an element to the end of the array, and then `shift()` to remove the first element.
* The second approach uses the spread operator (`...`) to create a new array with the original elements and the additional one.

**Options Compared**

The benchmark compares two different approaches:

1. **Push Shift**: Using `push()` followed by `shift()`.
	* Pros:
		+ Simple and straightforward implementation.
	* Cons:
		+ May have higher overhead due to multiple operations on the array.
2. **Pop Spread**: Using the spread operator (`...`) to create a new array.
	* Pros:
		+ Often more efficient, as it avoids modifying the original array.

**Pros and Cons**

The choice between `push()` followed by `shift()` (Push Shift) and using the spread operator (Pop Spread) depends on various factors:

* **Performance**: Pop Spread is generally faster, as it creates a new array without modifying the original one.
* **Memory Usage**: Push Shift may have higher memory usage due to the temporary array created during the operation.
* **Code Readability**: Both approaches are readable and maintainable. However, Pop Spread might be more concise.

**Library Usage**

There is no library used in this benchmark.

**Special JavaScript Features or Syntax**

The use of spread operator (`...`) is a modern JavaScript feature introduced in ECMAScript 2015 (ES6). It allows creating new arrays by spreading existing ones.

**Alternative Approaches**

Other alternatives to the two approaches tested here:

* **Concatenation**: Using `concat()` to concatenate arrays.
	+ Pros: More memory-efficient than Push Shift, but slower due to function call overhead.
	+ Cons: May not be as readable or maintainable as Pop Spread.
* **Array.from() and spread operator combination**: Using `Array.from()` with the spread operator (`...`) to create a new array.
	+ Pros: Combines the benefits of both approaches (performance and readability).
	+ Cons: May have higher memory usage due to the additional function call.

In conclusion, when choosing between Push Shift and Pop Spread, consider factors such as performance, memory usage, code readability, and maintainability. Depending on your specific use case, one approach might be more suitable than the other.

Related benchmarks:

Push Shift vs Pop Spread. (version: 0)

Comparing performance of: Push shift vs Pop Spread

Created: 2 years ago by: Guest

Jump to the latest result

Push shift

Pop Spread

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):