Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
slice VS splice VS shift: who is the fastest to keep constant size (fork)
(version: 0)
100k list splice and shift win, they mutate list slice loose, it creates a copy of list 7.5x slower
Comparing performance of:
slice vs splice vs shift
Created:
5 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var list = []; for (var i = 0; i < 1000 * 1000; i++) { list.push(i); }
Tests:
slice
list.push('slice'); list.slice(0, 1);
splice
list.push('splice'); list.splice(0, 1);
shift
list.push('splice'); list.shift();
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
Fork
Test case name
Result
slice
splice
shift
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):
Let's break down the provided JSON and explain what's being tested. **Benchmark Definition** The benchmark is designed to compare the performance of three different ways to remove an element from the end of an array in JavaScript: 1. `slice()`: Creates a shallow copy of the array, removing the first element. 2. `splice()`: Modifies the original array by removing the first element. 3. `shift()`: Removes the first element from the array without creating a new one. The benchmark aims to determine which method is the fastest for keeping the size of the array constant. **Options Compared** * `slice()`: Creates a copy of the array, which can lead to increased memory usage and slower performance. * `splice()`: Modifies the original array, which can be faster but also modifies the data structure. * `shift()`: Removes the first element without creating a new one, which is likely to be the fastest option. **Pros and Cons of Each Approach** * `slice()`: + Pros: Creates a shallow copy of the array, preserving the original data. + Cons: Can lead to increased memory usage and slower performance due to the creation of a new array. * `splice()`: + Pros: Modifies the original array in-place, which can be faster. + Cons: Modifies the data structure, which might not be desirable if the original order needs to be preserved. * `shift()`: + Pros: Removes the first element without creating a new one, preserving the original data structure. + Cons: None apparent. **Library and Its Purpose** In the provided JSON, the `Array.prototype.slice()` method is used. The purpose of this method is to create a shallow copy of an array, returning a new array object containing the elements from the start index (0) up to but not including the end index. Similarly, `Array.prototype.splice()` modifies the original array by removing elements and returns an array of removed elements. **Special JS Feature or Syntax** None mentioned in this benchmark. The focus is on comparing different array manipulation techniques. **Other Alternatives** If you're looking for alternative ways to remove elements from an array without using `slice()`, `splice()`, or `shift()`: * You can use a loop with `push()` and `pop()` methods, like `list.pop();` repeated `n` times. * Alternatively, you could use `Array.prototype.indexOf()` and `Array.prototype.splice()` in combination to remove elements from the array. However, it's essential to note that these alternatives might not be as efficient or readable as using `slice()`, `splice()`, or `shift()`.
Related benchmarks:
slice VS splice: who is the fastest to keep constant size
slice VS splice VS shift: who is the fastest to keep constant size (fork no string push)
slice VS splice VS shift: who is the fastest to keep constant size 100
slice VS splice VS shift: who is the fastest to keep constant size [VARIANT]
Comments
Confirm delete:
Do you really want to delete benchmark?