Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
New Array Object vs New Array Literal
(version: 0)
Comparing performance of:
New Array Object vs New Array Literal
Created:
4 years ago
by:
Registered User
Jump to the latest result
Tests:
New Array Object
var arrayObject = new Array('hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world'); arrayObject.forEach(console.log)
New Array Literal
var arrayLiteral = ['hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world', 'hello', 'world']; arrayLiteral.forEach(console.log)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
New Array Object
New Array Literal
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, and some pros and cons of each approach. **Benchmark Definition** The benchmark is comparing two approaches to create an array in JavaScript: 1. **New Array Object**: Creating an array using the `new` keyword followed by a constructor function that takes a variable number of arguments (in this case, a string with comma-separated values). 2. **New Array Literal**: Creating an array using square brackets `[]` and adding elements to it using the syntax `array[index] = value`. **Script Preparation Code** The script preparation code is empty, which means that the benchmark starts from scratch for each test case. **Html Preparation Code** The html preparation code is also empty, which suggests that the benchmark is running in a headless browser (i.e., without a visible user interface). **Individual Test Cases** There are two test cases: 1. **New Array Object**: This test case creates an array using the `new` keyword and assigns it to a variable named `arrayObject`. The script then loops through the array using `forEach` and logs each element to the console. 2. **New Array Literal**: This test case creates an array using square brackets and adds elements to it using the syntax `array[index] = value`. The script then loops through the array using `forEach` and logs each element to the console. **Library Used** There is no explicit library used in these test cases, but it's likely that a JavaScript runtime environment (e.g., V8) or a browser engine (e.g., Blink) provides the necessary functionality for creating arrays and executing loops. **Special JS Features/Syntax** Neither of these approaches uses any special JavaScript features or syntax. They are both standard JavaScript syntax. **Pros and Cons** Here's a brief summary of the pros and cons of each approach: 1. **New Array Object**: * Pros: Can be more explicit and easy to understand, especially for developers who prefer a functional programming style. * Cons: May incur performance overhead due to the creation of an object and the use of `new`. 2. **New Array Literal**: * Pros: Typically faster and more efficient than creating an array using `new`, as it avoids the overhead of object creation and can be optimized by the browser engine. * Cons: Can be less explicit and more prone to errors, especially for developers who are not familiar with this syntax. **Other Alternatives** Some alternative approaches to creating arrays in JavaScript include: 1. **Array constructor**: `new Array(10)`. This approach is similar to using `new` keyword, but it's a bit more concise. 2. **Array.from() method**: `Array.from([1, 2, 3], (value) => value).forEach((value) => console.log(value));`. This approach uses the `from()` method to create an array from an iterable source, such as an array or a string. Keep in mind that these alternatives may have different performance characteristics and use cases compared to the original approaches being tested.
Related benchmarks:
Object.create(null) vs Object literal
Array.from() vs new Array() - empty
new TypedArray() vs TypedArray.of()
Array.from() vs new A
Array.from() vs new Array() vs []
Comments
Confirm delete:
Do you really want to delete benchmark?