Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Array.prototype.concat vs spread operato
(version: 0)
Compare the new ES6 spread operator with the traditional concat() method
Comparing performance of:
Array.prototype.concat vs spread operator
Created:
4 years ago
by:
Guest
Jump to the latest result
Tests:
Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Array.prototype.concat
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 break down the provided benchmark and explain what is being tested, compared, and analyzed. **What is being tested?** The benchmark compares two approaches to concatenate arrays in JavaScript: 1. **`Array.prototype.concat()`**: A traditional method that uses the `concat()` function to merge two arrays. 2. **Spread operator (`...`)**: A new ES6 feature introduced in 2015, which allows for more concise and expressive array concatenation. **Options compared** The benchmark tests both approaches on the same input data: * For `Array.prototype.concat()`, the code uses: + `var params = [ "hello", true, 7 ];` + `var other = [ 1, 2 ].concat(params);` * For the spread operator, the code uses: + `var params = [ "hello", true, 7 ]` + `var other = [ 1, 2, ...params ]` **Pros and Cons of each approach** **`Array.prototype.concat()`**: Pros: * Widely supported across browsers and Node.js versions. * Easy to understand for developers familiar with traditional array manipulation. Cons: * Can be slower due to the overhead of calling a method on an array. * May not be as expressive or concise as other options. **Spread operator (`...`)** Pros: * More concise and expressive than traditional `concat()` methods. * Can be faster in modern browsers and Node.js versions that support it. Cons: * Requires modern JavaScript features (ES6+) to be supported. * May have compatibility issues with older browsers or versions of Node.js. **Other considerations** Both approaches are suitable for simple array concatenation tasks. However, the spread operator offers a more concise and expressive way to achieve this, making it a popular choice in modern JavaScript development. **Library/Utility used** None is explicitly mentioned in the benchmark definition. The tests rely on built-in JavaScript features and do not use any external libraries or utilities. **Special JS feature/syntax** The spread operator (`...`) is a special JavaScript feature introduced in ES6 (ECMAScript 2015). It allows for concise array expansion, enabling code like `var other = [ 1, 2, ...params ]` to create new arrays by spreading elements from another array. **Alternatives** Other alternatives for concatenating arrays include: * Using the `push()` method: `arr.push(...[1, 2]);` * Using the `set()` method (for older browsers that don't support spread): `arr.set(3); arr.set(4);`
Related benchmarks:
concat 2 arrays: Array.prototype.concat vs spread operator
Array.prototype.concat vs spread operator (add)
Array.prototype.concat vs spread operator (fix)
Array.prototype.concat vs spread operator on large array
Array.prototype.concat vs spread operator on small array
Comments
Confirm delete:
Do you really want to delete benchmark?