Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Array() vs Array.from() fill
(version: 0)
Testing the difference between creating filled arrays.
Comparing performance of:
Array() vs Array.from()
Created:
2 years ago
by:
Guest
Jump to the latest result
Tests:
Array()
Array(500).fill(false)
Array.from()
Array.from({length:500}).fill(false)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Array()
Array.from()
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
4 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:146.0) Gecko/20100101 Firefox/146.0
Browser/OS:
Firefox 146 on Windows
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=623065" width="100%" height="500px"></iframe>
Test name
Executions per second
Array()
271130.4 Ops/sec
Array.from()
194671.3 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and its test cases. **Benchmark Overview** The benchmark, named "Array() vs Array.from() fill", compares the performance of creating filled arrays using two different methods: `Array()` and `Array.from()`. The goal is to determine which method is faster and more efficient. **Options Compared** Two options are compared: 1. **`Array()`**: This method creates a new array instance by calling the `Array()` constructor, followed by the `fill()` method to populate it with a specified value. 2. **`Array.from()`**: This method creates a new array instance from an iterable source, such as an object or another array, using the spread operator (`...`) and the `from()` method. **Pros and Cons of Each Approach** 1. **`Array()`**: * Pros: + Can be more concise and readable in some cases. + Allows for easier control over the initial value and value type. * Cons: + May incur a performance overhead due to the constructor call. + Can lead to unnecessary memory allocations if not used carefully. 2. **`Array.from()`**: * Pros: + Often more concise and readable than using `Array()`. + Allows for easy creation of arrays from various iterables (e.g., objects, strings). * Cons: + May incur a performance overhead due to the object creation and spread operator operations. + Can lead to unnecessary memory allocations if not used carefully. **Library Used** There is no explicit library mentioned in the benchmark definition. However, `Array.from()` relies on the built-in `from` method of JavaScript arrays, which may have some underlying library or framework dependencies (e.g., ECMAScript 2015+ features). **Special JS Feature/Syntax** None are explicitly mentioned in this example. **Other Considerations** When benchmarking these two approaches, it's essential to consider factors like: * Memory allocation and deallocation * Constructor call overhead * Spread operator operations * Browser and platform-specific optimizations These considerations can impact the performance difference between `Array()` and `Array.from()`. **Alternatives** If you're looking for alternative methods or libraries to create filled arrays, some options include: 1. **`new Int32Array(length)`**: Creates a typed array instance with a specified length. 2. **`new Float64Array(length)`**: Creates a typed array instance with a specified length and data type. 3. **`Array(500).fill(0)`**: A more concise alternative to `Array().fill(false)`, using an integer value (0) instead of a boolean value. Note that these alternatives might not be as efficient or readable as the original methods, but they can provide different trade-offs in terms of performance and code complexity.
Related benchmarks:
Array.from() vs new Array()
my Array.from() vs new Array()
Array.from() vs new Array() - empty
Array(length).fill() vs Array.from({ length: length })
Comments
Confirm delete:
Do you really want to delete benchmark?