Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
array methods test1231234
(version: 3)
Comparing performance of:
Array.prototype.concat vs Array.prototype.push vs Array.prototype.splice vs spread operator
Created:
5 years ago
by:
Registered User
Jump to the latest result
Script Preparation code:
var arr = [1, 2, 3];
Tests:
Array.prototype.concat
var other = arr.concat([99]);
Array.prototype.push
var other = arr.push(99);
Array.prototype.splice
var other = arr.splice(arr.length-1, 0, 99);
spread operator
var other = [ ...arr, 99 ]
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
Fork
Test case name
Result
Array.prototype.concat
Array.prototype.push
Array.prototype.splice
spread operator
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 dive into the world of JavaScript microbenchmarks! **What is being tested?** The provided JSON represents a set of test cases for measuring the performance of various array methods in JavaScript: `concat`, `push`, and the spread operator (`...`). The tests are designed to compare the execution times of these three methods when used with different arrays. **Options compared:** 1. **`Array.prototype.concat()`**: This method creates a new array by copying elements from an existing array. 2. **`Array.prototype.push()`**: This method adds one or more elements to the end of an array and returns the new length of the array. 3. **Spread operator (`...`)**: This is a shorthand syntax for creating a new array from existing elements. **Pros and cons:** 1. **`concat()`**: * Pros: Simple, intuitive, and widely supported. * Cons: Creates a new array, which can be memory-intensive for large datasets. 2. **`push()`**: * Pros: Modifies the original array in-place, reducing memory allocation. * Cons: May incur performance overhead due to repeated assignments. 3. **Spread operator (`...`)**: * Pros: Efficient, modern syntax that creates a new array without modifying the original. * Cons: Less intuitive for some developers and may not be supported in older browsers. **Library usage:** None of the provided test cases use any external libraries. The focus is solely on measuring the performance of JavaScript's built-in array methods. **Special JS feature/syntax:** The spread operator (`...`) is a relatively recent addition to JavaScript, introduced in ECMAScript 2018 (ES2018). It allows for concise array creation and modification. **Benchmark preparation code:** The script preparation code `var arr = [1, 2, 3];` creates an initial array of three elements. Each test case then performs a specific operation on this array to measure the performance of the corresponding array method. **Other alternatives:** To further improve benchmarking and testing, you could consider adding more test cases, such as: * Comparing the performance of different data types (e.g., numbers, strings, objects) with each array method. * Testing the performance of array methods on large datasets or edge cases. * Incorporating additional metrics, like memory usage or garbage collection overhead. By expanding the scope of your benchmarking effort, you can gain a more comprehensive understanding of JavaScript's array methods and their performance characteristics.
Related benchmarks:
Array clone
arr delete: length=0 vs []
array.splice vs array.length
Clone Array - 08/02/2024
array.length = 0 vs []
Comments
Confirm delete:
Do you really want to delete benchmark?