Benchmark: spread vs slice to delete first element javascript

Tests:

spread
const a = [1,2,3,4,5,6,7,8,9,0]; const [, ...b] = a;
slice
const a = [1,2,3,4,5,6,7,8,9,0]; a.slice(1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread
slice

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 dive into the world of JavaScript microbenchmarks and explore what's being tested on MeasureThat.net.

**Benchmark Overview**

The benchmark is comparing two approaches to delete the first element from an array in JavaScript: using the spread operator (`...`) and the `slice()` method. The test case consists of a simple array with 11 elements, including a zero at the beginning.

**Options Compared**

There are two options being compared:

1. **Spread Operator (`...`)**: This approach uses the spread operator to extract all elements from the array except the first one. The syntax is `const [, ...b] = a;`, where `a` is the original array.
2. **`slice()` Method**: This approach uses the `slice()` method to create a new array with all elements from the index 1 to the end of the original array. The syntax is `a.slice(1);`.

**Pros and Cons of Each Approach**

* **Spread Operator (`...`)**
	+ Pros:
		- More concise and expressive code
		- Creates a new array without modifying the original one
	+ Cons:
		- Might be slower due to the creation of a new array
		- Less readable for developers who are not familiar with this syntax
* **`slice()` Method**
	+ Pros:
		- Faster execution because it modifies the original array (if needed)
		- More readable code, especially when working with large arrays or complex filtering logic
	+ Cons:
		- Modifies the original array if `slice()` returns a new value
		- Requires more code to achieve the same result as using the spread operator

**Library and Special JS Features**

None of the test cases use any external libraries, but it's worth noting that MeasureThat.net is designed to isolate the effects of JavaScript features and syntax variations.

**Special JS Feature or Syntax**

There are no special JS features or syntaxes being tested in this benchmark. The focus is on comparing two simple array manipulation approaches.

**Other Considerations**

* **Array Performance**: When working with large arrays, the performance difference between these two approaches might be negligible. However, for smaller arrays, the spread operator might have a slight performance advantage.
* **Code Readability and Maintainability**: Depending on the specific use case and personal coding style, one approach might be more readable or maintainable than the other.

**Alternative Benchmarks**

There are several alternative benchmarks that MeasureThat.net offers, such as:

* Array methods comparison (e.g., `map()`, `filter()`, `reduce()` vs. native implementations)
* Regular expression performance
* String manipulation and string interpolation optimizations

These alternatives allow developers to compare different approaches to common JavaScript tasks and optimize their code for better performance or readability.

In conclusion, this benchmark provides a simple example of how the spread operator compares to the `slice()` method in terms of execution speed. By understanding the pros and cons of each approach, developers can make informed decisions about which method to use in their own projects.

Related benchmarks:

spread vs slice to delete first element javascript (version: 0)

Comparing performance of: spread vs slice

Created: 6 years ago by: Guest

Jump to the latest result

spread

slice

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):