Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Array.from vs Spread 2
(version: 0)
Comparing performance of:
Array.from vs Spread
Created:
6 years ago
by:
Registered User
Jump to the latest result
Tests:
Array.from
var fooSet = new Set(); for(var i=0;i<10000;i++) { fooSet.add(i); } var other = Array.from(fooSet);
Spread
var fooSet = new Set(); for(var i=0;i<10000;i++) { fooSet.add(i); } var other = [...fooSet];
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Array.from
Spread
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):
**Benchmark Overview** The provided benchmark, "Array.from vs Spread 2", measures the performance difference between using `Array.from()` and the spread operator (`...`) to create an array from a Set object. **Test Case Analysis** Each test case consists of two steps: 1. **Script Preparation Code**: A new Set object is created and populated with 10,000 elements. 2. **Benchmarking Loop**: The script runs a loop that creates another array by: * Using `Array.from()` to create an array from the Set object (Test Case "Array.from"). * Using the spread operator (`...`) to create an array from the Set object (Test Case "Spread"). **Options Compared** The two options compared are: 1. **`Array.from()`**: A built-in JavaScript method that creates a new array from an iterable (such as a Set) by iterating over each element and adding it to the new array. 2. **Spread Operator (`...`)**: A syntax feature introduced in ECMAScript 2015, which allows for dynamic array creation by spreading an iterable into an array. **Pros and Cons** * **`Array.from()`**: + Pros: More explicit and readable, allows for filtering or mapping the elements. + Cons: May incur additional overhead due to iteration. * **Spread Operator (`...`)**: + Pros: More concise and expressive, can be used with other syntax features like destructuring. + Cons: Less explicit, may lead to unexpected behavior if not used carefully. **Library Usage** In this benchmark, the `Set` object is used as an iterable. The `Set` object is a built-in JavaScript data structure that stores unique values and provides methods for adding, removing, and checking the presence of elements. **Special JS Feature or Syntax** The spread operator (`...`) is used in one of the test cases. This syntax feature allows for dynamic array creation by spreading an iterable into an array. **Other Alternatives** If `Array.from()` or the spread operator were not available, alternative methods to create an array from a Set object could include: * Using `for...in` loop and concatenating elements * Using `reduce()` method and accumulating elements in an array These alternatives would likely be slower and less efficient than using `Array.from()` or the spread operator.
Related benchmarks:
Javascript string to array mapping: Array.from() vs Spread syntax [...spread]
Array.from() vs spread []
JS array spread operator vs push
Array .push() vs spread operator
spread vs ArrayFrom
Comments
Confirm delete:
Do you really want to delete benchmark?