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new TypedArray() vs TypedArray.of()
(version: 1)
Comparing performance of:
new vs .of()
Created:
2 years ago
by:
Registered User
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Tests:
new
const array = new Float32Array([1, 2, 3]);
.of()
const array = Float32Array.of(1, 2, 3);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
new
.of()
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll explain the JavaScript microbenchmark being tested on MeasureThat.net. The benchmark is designed to compare two approaches for creating TypedArray objects: using the `new` keyword (`new Float32Array([1, 2, 3])`) and using the `.of()` method (`Float32Array.of(1, 2, 3)`). **New Approach (using `new`)** * The `new` keyword is used to create a new instance of the TypedArray constructor. In this case, `Float32Array`. * The callback function passed to the `TypedArray` constructor is used to initialize the array with values. Pros: 1. More flexible: allows for passing options and callbacks when creating the TypedArray. 2. Compatible with older browsers that don't support `.of()` method. Cons: 1. Less concise: requires more code than using `.of()`. 2. May lead to performance issues if not implemented correctly (e.g., using `new` can create a temporary object that's then wrapped in the final TypedArray, which can be slower). **Of Approach (.of())** * The `.of()` method is used to create a new TypedArray from an array-like object or other iterable. * In this case, it's used with an array of numbers. Pros: 1. More concise: requires less code than using the `new` keyword. 2. Efficient: can be faster than using `new`, especially for larger arrays. Cons: 1. Less flexible: doesn't allow for passing options or callbacks when creating the TypedArray. 2. May not work in older browsers that don't support `.of()` method. **Library Used** The `Float32Array` and `TypedArray` constructors are part of the Web API (ECMAScript standard), which means they're native to JavaScript. **Special JS Feature/ Syntax** There's no special JavaScript feature or syntax used in this benchmark, other than using TypedArrays, which is a modern web development concept. **Other Alternatives** If you need to create TypedArray objects in JavaScript, the `.of()` method is generally considered more efficient and concise. However, if you're working with older browsers that don't support `.of()`, or if you need more control over the creation process, using the `new` keyword might be a better option. In general, for most use cases, using the `.of()` method is the recommended approach, as it provides better performance and conciseness.
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