Benchmark: Splice Slice - MeasureThat.net

Script Preparation code:

var array = new Array(100).map(a => ({
    a: 'b',
    b: 'c',
    d: 'e'
}))

Tests:

Slice
array.slice(1)
Splice
array.splice(1)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Slice
Splice

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 MeasureThat.net and explore the JavaScript microbenchmark you provided.

**What is being tested?**

The benchmark measures the performance of two methods: `array.slice(1)` and `array.splice(1)`. These methods are used to extract a subset of elements from an array. The test creates a large array (100 elements) with some common properties (`a: 'b'`, `b: 'c'`, and `d: 'e'`) and then uses these two methods to slice or splice the array.

**Options compared**

There are two options being compared:

1. **`array.slice(1)`**: This method creates a new array with the same elements as the original array, but starting from index 1.
2. **`array.splice(1)`**: This method modifies the original array by removing the element at index 0 and replacing it with the elements at indices 1 and beyond.

**Pros and cons of each approach**

* `array.slice(1)`: Pros:
	+ Creates a new array, which can be beneficial if the resulting array is large or used for further processing.
	+ Preserves the original array's integrity.
Cons:
	+ Can be slower than modifying the original array (see below).
	+ Requires more memory since it creates a new array.
* `array.splice(1)`: Pros:
	+ Modifies the original array, which can reduce memory usage if the modified array is not needed elsewhere.
Cons:
	+ Changes the original array's structure, which might be unexpected or undesirable in some cases.
	+ Can be slower than creating a new array for large arrays.

**Library and its purpose**

None of the test code uses any external libraries. However, it does create an array using the `new Array` constructor and the `map()` method.

**Special JavaScript features/syntax (not applicable)**

There are no special JavaScript features or syntax used in this benchmark.

**Other alternatives**

If you were to write a similar benchmark, you could also consider testing:

* Using `Array.prototype.map()` with a callback function to create a new array.
* Using `Array.prototype.filter()` and then using the resulting filtered array as an alternative to slicing/splicing.
* Testing the performance of different JavaScript engines (e.g., V8, SpiderMonkey) or browsers.

Keep in mind that these alternatives would require modifying the test code slightly, but they could provide additional insights into the performance characteristics of different methods.

Related benchmarks:

Splice Slice (version: 0)

Splice Slice

Comparing performance of: Slice vs Splice

Created: 2 years ago by: Guest

Jump to the latest result

Slice

Splice

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):