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Write Object vs Map
(version: 0)
Comparing performance of:
Object vs Map
Created:
4 years ago
by:
Guest
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Tests:
Object
const max = 1e4; const obj = {} for (let i = 0; i < max; i++) { const random = Math.random() const randomString = String(random) obj[randomString] = random; }
Map
const max = 1e4; const map = new Map() for (let i = 0; i < max; i++) { const random = Math.random() const randomString = String(random) map.set(randomString, random) }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Object
Map
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 benchmark and its components, explaining what's being tested, compared, and other considerations. **Benchmark Overview** The `MeasureThat.net` website provides a microbenchmarking platform where users can compare different JavaScript approaches to perform common operations. The provided benchmark compares two approaches: 1. **Object**: Creating an object using literal syntax (`{}`) with random keys. 2. **Map**: Creating a `Map` instance and setting entries using the `set()` method. **Options Compared** The benchmark tests two options for creating and manipulating data in JavaScript: 1. **Objects**: Using objects (arrays with dot notation) to store key-value pairs, where each key is generated randomly. 2. **Maps**: Using `Map` instances to store key-value pairs, where each key is generated randomly. **Pros and Cons of Each Approach** **Objects:** Pros: * Widespread support in most browsers * Familiar syntax for developers who have worked with arrays or objects before Cons: * Can lead to slower performance due to object lookup and iteration * May not be as efficient for large datasets or complex key-value pairs **Maps:** Pros: * Designed specifically for fast key-value pair lookups * Often more performant than objects, especially for large datasets * Provides additional features like `forEach()` and `entries()` Cons: * Not as widely supported in older browsers or older versions of modern browsers * May require more code and setup compared to object syntax **Library Used** None is explicitly mentioned in the benchmark, but both approaches rely on built-in JavaScript data structures. **Special JS Features or Syntax (Not Applicable)** No special features or syntax are used in this benchmark. Both approaches use standard JavaScript data structures. **Other Alternatives** For large-scale data manipulation and performance-critical applications, alternatives like: 1. **Typed Arrays**: Provide faster access to numerical or binary data. 2. **WeakMaps**: Offer a more lightweight alternative to `Map` instances for frequent key-value lookups. 3. **Native Array methods**: Utilize optimized array methods (e.g., `forEach()`, `map()`) for efficient iteration. Keep in mind that the choice of approach depends on specific requirements, such as performance, compatibility, and code complexity. **Benchmark Context** The benchmark likely aims to compare the relative performance of objects and maps in various use cases. By providing a controlled environment with random key generation, the benchmark ensures consistent results across different browsers and devices.
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