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Assignment of value vs Destructuring an object lite
(version: 0)
Comparing performance of:
Assign vs Destructure
Created:
2 years ago
by:
Guest
Go to the latest result
Tests:
Assign
const obj = {a: 'stringA', b: 'stringB', c: 'stringC' }; const a = obj.a; console.log(a);
Destructure
const obj = {a: 'stringA', b: 'stringB', c: 'stringC' }; const { a } = obj; console.log(a);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Assign
Destructure
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36
Browser/OS:
Chrome 119 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=488910" width="100%" height="500px"></iframe>
Assign
485K/s
Destructure
475K/s
View exact numbers
Test name
Executions per second
✓
Assign
485,240 Ops/sec
Destructure
475,302 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the provided benchmark and its options, pros, cons, and considerations. **Benchmark Overview** The MeasureThat.net benchmark compares two approaches to assign values in JavaScript: traditional assignment using `const` and destructuring an object. **Options Compared** 1. **Assignment using `const`**: This approach uses a traditional assignment syntax, where the value of `obj.a` is directly copied into the variable `a`. This method is straightforward but might not be as efficient or safe in some cases. 2. **Destructuring an object**: This approach uses destructuring syntax to extract values from an object. Specifically, it extracts only the value of `obj.a` and assigns it to the variable `a`. **Pros and Cons** **Assignment using `const`:** Pros: * Easy to read and understand * Wide support across browsers Cons: * May be slower due to string concatenation or DOM operations (if used in a template literal) * Might not be as efficient for large datasets, as it creates multiple assignments **Destructuring an object:** Pros: * Can be more efficient, especially when working with large datasets, as it reduces the number of assignments * Often faster due to fewer DOM operations or string concatenation Cons: * Requires JavaScript 14+ support (feature introduced in ECMAScript 2020) * May require explicit type annotations or object initialization for compatibility issues * Syntax might be less intuitive for developers unfamiliar with destructuring **Library Considerations** None. **Special JS Feature/Syntax** The test case uses the `const` keyword, which is a fundamental JavaScript feature. No special syntax is required beyond basic understanding of variable declarations and assignment. **Other Alternatives** For comparison purposes, MeasureThat.net might consider alternatives like: 1. **Using `let` or `var` instead of `const`:** This would involve testing the performance impact of using mutable variables. 2. **Assigning values directly in a template literal:** This would test if assignment through string interpolation is faster than traditional assignment. 3. **Other object destructuring approaches (e.g., using arrays or maps):** These might provide additional insights into the efficiency and readability benefits of different data structures. Keep in mind that MeasureThat.net's goal is to create a comprehensive benchmarking platform, so exploring various alternatives can help ensure a more representative picture of performance and readability trade-offs.
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