Benchmark: Array.prototype.splice vs spread operator with slice for removal of entity

Tests:

slice with spread operator
var params = [ "hello", true, 7, "test" ]; var other = [...params.slice(0, 1), ...params.slice(2)];
splice operator
var params = [ "hello", true, 7, "test" ]; var other = params.splice(1, 1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
slice with spread operator
splice operator

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36

Browser/OS: Chrome 80 on Windows

View result in a separate tab

Test name	Executions per second
slice with spread operator	6446745.0 Ops/sec
splice operator	13222884.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks!

**Benchmark Overview**

The provided JSON represents a benchmark test case on MeasureThat.net, which compares the performance of two approaches: using the spread operator (`...`) with `slice()` for removing an entity from an array, and using the traditional `splice()` method.

**Options Compared**

Two options are compared in this benchmark:

1. **Spread Operator with Slice**: This approach uses the spread operator (`...`) to create a new array that includes elements before and after the specified index. The `slice()` method is used to extract the desired range of elements from the original array.
2. **Traditional Splice Method**: This approach uses the `splice()` method to remove an element at a specified index.

**Pros and Cons**

Both approaches have their advantages and disadvantages:

* **Spread Operator with Slice**:
	+ Pros: More readable, concise code; avoids modifying the original array (returns a new array).
	+ Cons: May incur higher overhead due to creating a new array.
* **Traditional Splice Method**:
	+ Pros: Can be more efficient for large arrays, as it only modifies the existing array.
	+ Cons: Modifies the original array, which can be undesirable in some cases.

**Library and Purpose**

None of the libraries are explicitly mentioned in the provided JSON. However, the `slice()` method is a built-in JavaScript method that belongs to the Array prototype.

**Special JS Feature or Syntax**

The benchmark uses the spread operator (`...`), which was introduced in ECMAScript 2015 (ES6). The spread operator allows for creating new arrays by including elements from an existing array, and it's often used as a shorthand for `Array.prototype.slice()` with the spread syntax.

**Other Alternatives**

Other alternatives to compare performance could be:

* Using `concat()` instead of the spread operator
* Using `filter()` instead of `splice()`
* Comparing different browsers or Node.js versions

Keep in mind that the specific alternatives will depend on the goals and requirements of the benchmark.

I hope this explanation helps you understand the benchmark and its options!

Related benchmarks:

Array.prototype.splice vs spread operator with slice for removal of entity (version: 0)

Compare the new ES6 spread operator with the traditional splice() method

Comparing performance of: slice with spread operator vs splice operator

Created: 4 years ago by: Guest

Jump to the latest result

slice with spread operator

splice operator

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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