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Object spread vs no spread
(version: 0)
Comparing performance of:
Object spread vs No spread
Created:
2 years ago
by:
Registered User
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Script Preparation code:
baseObject = { a: 1, b: 2, c: 3, d: 4, e: '5', f: '6', g: '7', h: '8', }
Tests:
Object spread
const myObject = { ...baseObject, a: 1, bb: 2, c: 3, dd: 4, e: '5', ff: '6', g: '7', hh: '8', }
No spread
const myObject = { a: 1, b: 2, bb: 2, c: 3, dd: 4, d: 2, e: '5', ff: '6', f: '6', g: '7', hh: '8', h: '8', }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Object spread
No spread
Fastest:
N/A
Slowest:
N/A
Latest run results:
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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 discussed. **Benchmark Overview** The benchmark compares two approaches to creating objects in JavaScript: 1. **Spread Syntax (Object Spread)**: This approach uses the spread operator (`...`) to create a new object by spreading an existing object into it. 2. **No Spread**: This approach creates a new object by manually copying properties from one object to another. **Options Compared** The two options are being compared in terms of: * Performance (measured by `ExecutionsPerSecond`) * Code efficiency * Readability and maintainability **Pros and Cons** ### Object Spread Pros: * More concise and readable code * Can be more efficient for large objects with many properties Cons: * May be slower due to the overhead of creating a new object using the spread operator * Less control over property creation (i.e., you can't specify the order or uniqueness of properties) ### No Spread Pros: * Can be faster since it doesn't involve creating a new object using the spread operator * Allows for more control over property creation, such as specifying the order or uniqueness of properties Cons: * More verbose and less readable code * May require more manual effort to copy properties correctly **Library and Special JS Features** In this benchmark, the `...` spread operator is used in both options. The `Object.assign()` method is not explicitly mentioned, but it's implied that it could be an alternative way to achieve the "no spread" approach. There are no special JavaScript features or syntax being tested in this benchmark, as both approaches rely on standard JavaScript language features. **Alternative Approaches** Other alternatives for creating objects in JavaScript include: * Using the `Array.prototype.reduce()` method to create a new object from an array of key-value pairs * Utilizing library functions like `lodash` or `underscore`, which provide optimized implementations for object creation and manipulation However, these approaches are not being tested in this specific benchmark. **Additional Considerations** When working with objects in JavaScript, it's essential to consider factors such as: * Performance: How will the chosen approach impact execution time? * Code readability and maintainability: How easy is the code to understand and modify? * Error handling: What happens if an object property is missing or has a specific value? By considering these factors and using best practices, developers can create efficient, readable, and maintainable object-related code in JavaScript.
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