Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Splice vs. Spread Slice
(version: 0)
Comparing performance of:
Slice vs Splice
Created:
5 years ago
by:
Guest
Jump to the latest result
Tests:
Slice
const arr = [1,2,3,4,5,6]; [...arr.slice(0,2),...arr.slice(3)]
Splice
const arr = [1,2,3,4,5,6]; arr.splice(2,1)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Slice
Splice
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Overview** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The benchmark in question, titled "Splice vs. Spread Slice", tests the performance difference between using the `splice()` method versus the spread operator (`...`) with slicing. **Options Compared** The two options being compared are: 1. **`arr.splice(2, 1)`**: This uses the `splice()` method to remove the element at index 2 from the array. 2. **`[...arr.slice(0, 2), ...arr.slice(3)]`**: This uses the spread operator (`...`) with slicing to create a new array that includes elements from `arr.slice(0, 2)` and `arr.slice(3)`. **Pros and Cons of Each Approach** 1. **`arr.splice(2, 1)`**: * Pros: Efficient and direct way to remove an element. * Cons: Modifies the original array, can be slower for large arrays due to the shift operation (if the removed element is not at the end). * Note: This method uses a temporary variable to store the result of `splice()`, which might incur additional overhead. 2. **`[...arr.slice(0, 2), ...arr.slice(3)]`**: * Pros: Does not modify the original array, can be faster for large arrays since it avoids the shift operation. * Cons: Creates a new array, which can lead to increased memory allocation and garbage collection. **Library and Special JS Features** Neither of these approaches requires any additional libraries or special JavaScript features. They are basic, built-in methods/constructors that are part of the JavaScript language standard. **Test Case Explanation** The test case is designed to measure the performance difference between these two approaches. The benchmark definition in JSON format contains a single line of code for each approach, which defines the array `arr` and then performs the respective operation on it. **Other Alternatives** There are other ways to achieve similar results, such as using `map()` or `filter()`: * **Using `map()`**: Instead of using slicing, you can use `map()` to create a new array with the desired elements. For example: `[...arr.map((x) => x !== 3 ? undefined : x)]` * **Using `filter()`**: You can also use `filter()` to create a new array with the desired elements. However, this approach might be slower than using slicing or `map()`, as it creates a new array. Keep in mind that these alternative approaches may have different performance characteristics and trade-offs, depending on your specific use case.
Related benchmarks:
Slice & Splice vs ES6 Array Spread
non-mutating array remove: spread and slice vs slice and splice
Splice vs Spread (immutable only)
Slice vs splice forked
Slice vs splice 2 ...
Comments
Confirm delete:
Do you really want to delete benchmark?