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MapvsObject123456
(version: 0)
Comparing performance of:
Map vs Object
Created:
3 years ago
by:
Guest
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Tests:
Map
const myMap = new Map() myMap .set('1', 'one') .set('Erick', { text: 'two' }) const oi = [...myMap]
Object
const ola = { 1: 'one', Erick: { text: 'two' } } const oi = Object.entries(ola)
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Suite status:
<idle, ready to run>
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Test case name
Result
Map
Object
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Understanding the Benchmark** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided JSON represents a benchmark with two test cases: `Map` and `Object`. The objective of this benchmark is to compare the performance of creating an array from a map versus creating an array from an object using JavaScript's built-in methods. **Options Compared** Two approaches are compared: 1. **Creating an array from a map**: This approach uses the spread operator (`...`) on the map object to create a new array. 2. **Creating an array from an object**: This approach uses `Object.entries()` method to iterate over the object's key-value pairs and creates a new array. **Pros and Cons of Each Approach** 1. **Creating an array from a map**: * Pros: + More concise and readable code. + Can be faster since it avoids the overhead of creating an intermediate array using `Object.keys()` or `for...in` loop. * Cons: + May not work as expected if the map contains non-enumerable properties (e.g., prototype chain). 2. **Creating an array from an object**: * Pros: + Works with any object, regardless of its properties. * Cons: + Can be slower since it involves creating an intermediate array using `Object.entries()`. **Special Considerations** There are no special JavaScript features or syntax mentioned in the benchmark definition. However, it's worth noting that modern browsers and JavaScript engines have optimized many built-in methods for performance, including `map`, `set`, and `Object.entries()`. **Library Used** None of the test cases use any external libraries. **Alternative Approaches** Other approaches to create an array from a map or object might include: * Using a `for...in` loop to iterate over the properties and push them into an array. * Using `Array.prototype.reduce()` method to accumulate the key-value pairs into an array. * Using a library like Lodash, which provides utility functions for working with objects and arrays. These alternative approaches may have different performance characteristics depending on the specific use case and JavaScript engine.
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