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toSpliced vs Spread
(version: 0)
Comparing performance of:
toSpliced vs Spread
Created:
2 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var array = Array.from({ length: 100 }).map((val, i) => i);
Tests:
toSpliced
var newArray = array.toSpliced(0, 0, 99);
Spread
var newArray = [99, ...array]
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
toSpliced
Spread
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
5 months ago
)
User agent:
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:145.0) Gecko/20100101 Firefox/145.0
Browser/OS:
Firefox 145 on Ubuntu
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Test name
Executions per second
toSpliced
4211596.0 Ops/sec
Spread
1097055.1 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **What is being tested?** The benchmark measures the performance difference between two approaches for creating a new array by removing elements from an existing array: `Array.prototype.toSpliced()` (if available) and the spread operator (`...`). **Options compared** There are two options being compared: 1. **`toSpliced()`**: This is a method in the Array prototype that creates a new array with the specified range of elements removed from the original array. It's called `toSpliced()` instead of `splice()`, which is the more traditional way to remove elements from an array. 2. **Spread operator (`...`)**: This is a feature introduced in ECMAScript 2015 (ES6) that allows creating a new array by spreading the elements of an existing array. **Pros and cons** Here are some pros and cons of each approach: * `toSpliced()`: + Pros: It's a built-in method, so it's likely to be optimized for performance. + Cons: It may not be supported in older browsers or versions of JavaScript that don't have this feature. * Spread operator (`...`): + Pros: It's a modern feature that's widely supported in modern browsers and JavaScript engines. It's also more concise and expressive. + Cons: It may not be as performant as `toSpliced()` for large arrays, since it creates a new array by copying all elements. **Other considerations** * **Browser support**: The benchmark is running on Chrome 127, which should have good support for both `toSpliced()` and the spread operator. However, if you're targeting older browsers or versions of JavaScript, you may need to use one approach over the other. * **JavaScript version**: This benchmark assumes ES6 syntax (the spread operator) and modern JavaScript features. If you need to support older versions of JavaScript, you may need to modify the code accordingly. **Library usage** There doesn't appear to be any libraries used in this benchmark. **Special JS feature or syntax** The benchmark uses a modern JavaScript feature: the spread operator (`...`). This is introduced in ECMAScript 2015 (ES6) and is widely supported in modern browsers and JavaScript engines.
Related benchmarks:
spread vs slice vs splice
Splice vs Spread to insert at beginning of array
Splice vs Spread vs Unshift to insert at beginning of array (fixed from slice)
Using Splice vs Spread vs Unshift to insert at beginning of array
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