Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
test Array.from vs Spread vs Slice vs new vs filter
(version: 0)
Comparing performance of:
Array.from vs Spread vs slice vs new Array vs filter :D
Created:
3 years ago
by:
Guest
Jump to the latest result
Tests:
Array.from
var fooSet = new Array(); for(var i=0;i<100;i++) { fooSet.push(i); } var other = Array.from(fooSet);
Spread
var fooSet = new Array(); for(var i=0;i<100;i++) { fooSet.push(i); } var other = [...fooSet];
slice
var fooSet = new Array(); for(var i=0;i<100;i++) { fooSet.push(i); } var other = fooSet.slice();
new Array
var fooSet = new Array(); for(var i=0;i<100;i++) { fooSet.push(i); } var other = new Array(fooSet);
filter :D
var fooSet = new Array(); for(var i=0;i<100;i++) { fooSet.push(i); } var other = fooSet.filter((x) => true)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (5)
Previous results
Fork
Test case name
Result
Array.from
Spread
slice
new Array
filter :D
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 dive into the provided JSON and explain what is being tested, the options compared, their pros and cons, and other considerations. **Benchmark Definition** The benchmark definition is a set of tests designed to compare the performance of different methods for creating an array from a given iterable or value. The test cases are: 1. `Array.from` 2. Spread syntax (`[...fooSet]`) 3. `slice` method 4. Creating a new array using the `new` keyword (`new Array(fooSet)`) 5. Using the `filter` method to create an array **Options Compared** The options compared in this benchmark are: * `Array.from` * Spread syntax (`[...fooSet]`) * `slice` method * Creating a new array using the `new` keyword (`new Array(fooSet)`) * Using the `filter` method to create an array **Pros and Cons of Each Approach** 1. **`Array.from`**: This method is often considered one of the most efficient ways to create an array from an iterable. It's also quite concise and expressive. * Pros: Fast, concise, expressive * Cons: May not be as familiar to older developers 2. **Spread syntax (`[...fooSet]`)**: This approach uses the spread operator to create a new array from the existing one. * Pros: Familiar to many developers, can be used with other data structures (e.g., objects) * Cons: May not be as efficient as `Array.from` in some cases 3. **`slice` method**: The `slice` method returns a shallow copy of a portion of an array. * Pros: Can be useful for creating a new array with a subset of the original data * Cons: Not ideal for creating a new array from scratch, as it involves copying existing elements 4. **Creating a new array using the `new` keyword (`new Array(fooSet)`)**: This approach creates a new array with the specified length and fills it with the same values as the original iterable. * Pros: Can be used to create an exact copy of the original data * Cons: Inefficient, as it involves creating a new array with the same length as the original 5. **Using the `filter` method to create an array**: This approach uses the `filter` method to create a new array containing only the elements that pass the test. * Pros: Can be used to create an array with specific conditions, but it's not the most efficient way to create an entire array **Other Considerations** * The use of modern JavaScript features like spread syntax and the `filter` method may make the code less compatible with older browsers or versions of JavaScript. * Creating a new array using the `new` keyword can lead to performance issues if the original iterable is large, as it involves creating a new array with the same length as the original. **Library Used** There is no specific library mentioned in the provided JSON. However, some libraries like Lodash or Ramda might provide additional methods for manipulating arrays, but they are not used in this benchmark. **Special JS Features** The test cases use some special JavaScript features: * Spread syntax (`[...fooSet]`) - a relatively new feature introduced in ECMAScript 2015 (ES6) * `slice` method - a built-in method of the Array prototype * `new` keyword with array creation - a common way to create an array in JavaScript Overall, this benchmark provides a useful comparison of different methods for creating arrays in JavaScript, helping developers understand the trade-offs and implications of each approach.
Related benchmarks:
Slice vs Spread
Array clone from index 1 to end: spread operator vs slice
Array slice vs array filter
Slice vs spread array
Array.prototype.slice vs spread op
Comments
Confirm delete:
Do you really want to delete benchmark?