Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Array.prototype.concat vs spread operator updated
(version: 0)
Compare the new ES6 spread operator with the traditional concat() method
Comparing performance of:
Array.prototype.concat vs spread operator
Created:
6 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 benchmark and explain what's being tested. **What is being tested?** The benchmark compares two approaches for concatenating arrays in JavaScript: 1. **`Array.prototype.concat()`**: This method has been part of the JavaScript language since its inception and is widely supported by browsers. 2. **ES6 Spread Operator (`...`)**: Introduced in ECMAScript 2015, this operator allows you to expand an array-like object into separate arguments for a function. **Options compared** The benchmark tests two specific scenarios: 1. `Array.prototype.concat()`: This test case concatenates an array of strings with another array using the `concat()` method. 2. ES6 Spread Operator (`...`): This test case concatenates an array of strings with another array using the spread operator. **Pros and Cons** Here are some pros and cons for each approach: * **`Array.prototype.concat()`**: + Pros: Wide browser support, easy to understand and use. + Cons: Can be slower than the ES6 Spread Operator in modern browsers, especially for large arrays. * **ES6 Spread Operator (`...`)**: + Pros: Generally faster than `concat()`, more concise syntax, and supports large array concatenations. + Cons: May not work as expected in older browsers or environments that don't support the ES6 specification. **Other considerations** The benchmark also takes into account: * **Device platform**: The test is run on a desktop Windows 10 machine with Chrome 79, which supports the ES6 Spread Operator. * **Browser version**: Both tests are run in the same browser instance (Chrome 79), which reduces variability. **Library or special JS feature** There are no libraries or special JavaScript features being used in this benchmark. The focus is on comparing two specific approaches to array concatenation. **Test users special syntax** The ES6 Spread Operator (`...`) is a special syntax introduced in ECMAScript 2015. It allows you to expand an array-like object into separate arguments for a function, making it more concise and expressive than traditional `concat()` usage. **Alternatives** If the spread operator is not supported by your browser or environment, you can use alternative methods for concatenating arrays, such as: * Using the `Array.prototype.push()` method to append elements to an existing array. * Using a loop to iterate over the elements of one array and push them onto another. Keep in mind that these alternatives may have performance implications compared to using the ES6 Spread Operator.
Related benchmarks:
concat 2 arrays: Array.prototype.concat vs spread operator
Array.prototype.concat vs spread operator (fix)
Array.prototype.concat vs spread operator real
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?