Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Concat vs Slice!!
(version: 0)
Comparing performance of:
Array.prototype.slice vs Array.prototype.concat
Created:
2 years ago
by:
Guest
Jump to the latest result
Tests:
Array.prototype.slice
var other = [ 1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2 ].slice();
Array.prototype.concat
var other = [].concat([ 1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2, ]);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Array.prototype.slice
Array.prototype.concat
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):
**What is being tested?** MeasureThat.net is testing the performance of two JavaScript methods: `Array.prototype.slice()` and `Array.prototype.concat()`. These methods are used to manipulate arrays in JavaScript. **Options compared** The test is comparing the performance of: 1. `Array.prototype.slice()`: This method creates a shallow copy of a portion of an array, starting from the specified start index and ending at the specified end index. 2. `Array.prototype.concat()`: This method creates a new array by concatenating two or more arrays. **Pros and cons of each approach** 1. **`Array.prototype.slice()`**: * Pros: More efficient in terms of memory usage, as it only copies the necessary elements from the original array. * Cons: May be slower than `concat()` because it requires multiple iterations over the array to create the slice. 2. **`Array.prototype.concat()`**: * Pros: Can be faster for large arrays, as it avoids the overhead of slicing and copying individual elements. * Cons: More memory-intensive, as it creates a new array that contains all the elements from the original arrays. **Library usage** There is no explicit library mentioned in the benchmark definition. However, `Array.prototype` is an object that provides methods for manipulating arrays, which are part of the ECMAScript standard. **Special JS features or syntax** None mentioned explicitly, but it's worth noting that these methods have been part of JavaScript for a long time and are widely supported across various browsers and environments. **Other alternatives** In addition to `Array.prototype.slice()` and `concat()`, other approaches might include: 1. Using the spread operator (`[...]`) or `Destructuring` to create new arrays. 2. Utilizing libraries like Lodash (which provides a `slice()` function) or Ramda (which provides a `sliceRight()` function). 3. Implementing custom looping constructs, such as using `for...of` loops or recursive functions. Keep in mind that the choice of implementation depends on the specific requirements and constraints of your project.
Related benchmarks:
Concat vs Slice
Spred add vs slice concat
test spread vs concat
Concat vs Slice f1
Comments
Confirm delete:
Do you really want to delete benchmark?