Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Array.prototype.concat vs spread operator_2
(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 provided benchmark and explain what's being tested, compared options, pros and cons of each approach, and other considerations. **Benchmark Overview** The benchmark compares two ways to merge an array with another array: using the traditional `Array.prototype.concat()` method versus the new ES6 spread operator (`...`). **Options Compared** 1. **`Array.prototype.concat()`**: This is a built-in JavaScript method that merges two arrays, returning a new array. 2. **ES6 Spread Operator (`...`)**: This is a new feature in JavaScript that allows you to merge arrays using the `...` operator. **Pros and Cons of Each Approach** 1. **`Array.prototype.concat()`**: * Pros: + Wide browser support (even older browsers may not support it) + Easy to understand and use * Cons: + Creates a new array, which can be memory-intensive for large arrays + Less efficient than the spread operator in modern browsers 2. **ES6 Spread Operator (`...`)**: * Pros: + More efficient than `concat()` in most modern browsers + Simplifies code and is more concise * Cons: + Requires ES6 support, which may not be available in older browsers or environments **Library Used** None explicitly mentioned. The benchmark uses built-in JavaScript features. **Special JS Feature/Syntax** The spread operator (`...`) was introduced in ECMAScript 2015 (ES6). It's a new way to merge arrays and is supported by most modern browsers, including Chrome 79 used in the benchmark. **Other Considerations** * The benchmark measures performance, so the choice between `concat()` and the spread operator has a significant impact on execution speed. * Modern browsers have optimized implementations of both methods, making them more efficient. However, older browsers may not support these features or may have slower implementations. * Code readability and maintainability are also important considerations when choosing between these two approaches. **Alternatives** If you need to merge arrays in an older browser or environment that doesn't support ES6 features, you may need to use `Array.prototype.concat()`. However, for most modern web development scenarios, the spread operator (`...`) is a convenient and efficient choice.
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?