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ok5}O.54<'fn9ZN2KFz=
(version: 0)
asd
Comparing performance of:
Object.values(obj) vs for...in
Created:
2 years ago
by:
Guest
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Tests:
Object.values(obj)
var a = { a: 1, b: 2, c: 3}; let sum = 0; Object.values(a).forEach((v) => { sum += v });
for...in
var a = { a: 1, b: 2, c: 3}; let sum = 0; for (var key in a) { const v = a[key]; sum += v; }
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Suite status:
<idle, ready to run>
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Test case name
Result
Object.values(obj)
for...in
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the provided benchmark and its details. **Benchmark Overview** The provided benchmark is comparing two ways to iterate over an object in JavaScript: `Object.values()` and `for...in`. The goal is to measure which approach is faster. **Options Compared** Two options are compared: 1. **`Object.values(obj)`**: This method returns an array of a given object's own enumerable property values. 2. **`for...in` loop with `key in obj`**: This traditional loop iterates over the object's properties using a `for` loop and checks if each property is enumerable. **Pros and Cons** **`Object.values(obj)`** Pros: * More modern, concise way to iterate over an object. * No need for explicit looping or checking properties. * Works with non-enumerable properties (using `Object.keys()` would). Cons: * May not work as expected if the object's properties are not enumerable (e.g., using `for...in`). * Requires modern JavaScript versions. **`for...in` loop** Pros: * Widely supported, works across all browsers and versions. * Can iterate over both enumerable and non-enumerable properties. Cons: * More verbose and less readable than `Object.values()`. * May be slower due to the extra overhead of checking property existence. **Library Used** None explicitly mentioned in the provided code. However, it's worth noting that `Object.values()` is a part of the ECMAScript Standard Library, while `for...in` is a built-in JavaScript construct. **Special JS Feature or Syntax (Not Mentioned)** No special features or syntax are used in this benchmark. Both options rely on standard JavaScript constructs and libraries. **Other Alternatives** Alternative ways to iterate over an object include: * Using `Array.prototype.forEach()`: This method can be more concise, but it's less readable than using a traditional loop. * Using `for...of` loop with `Object.entries()` or `Object.keys()`: These methods provide more flexibility and readability. However, in the context of this benchmark, `Object.values(obj)` is likely the preferred choice for its conciseness and modernity.
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