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El bencho 333
(version: 0)
Comparing performance of:
Object.spread vs comparison
Created:
7 years ago
by:
Guest
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Tests:
Object.spread
const a = { deliveredCount: 1, deliveryImpossibleCount: 0, failedCount: 0, submittedCount: 0, }; const b = { deliveredCount: 0, deliveryImpossibleCount: 0, failedCount: 0, processingCount: 0, submittedCount: 0, }; const c = {...b, ...a};
comparison
const a = { deliveredCount: 0, deliveryImpossibleCount: 0, failedCount: 0, submittedCount: 0, }; const b = { deliveredCount: 0, deliveryImpossibleCount: 0, failedCount: 0, processingCount: 0, submittedCount: 0, }; const aKeys = Object.keys(a).sort(); const bKeys = Object.keys(b).sort(); const c = JSON.stringify(aKeys) === JSON.stringify(bKeys);
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Suite status:
<idle, ready to run>
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Test case name
Result
Object.spread
comparison
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks! **What is being tested?** The provided JSON represents two test cases: 1. **Object.spread**: This test case measures the performance of object spread operator (`...`) when creating a new object by merging two existing objects (`a` and `b`). The benchmark definition code shows how to create this scenario: `const c = {...b, ...a};` 2. **Comparison**: This test case compares the sorted keys of two objects (`a` and `b`) using the `Object.keys()` method and then checks if the JSON representations of these sorted keys are equal (`JSON.stringify(aKeys) === JSON.stringify(bKeys);`). **Options compared** In both cases, the benchmark is comparing the performance of different approaches: * For **Object.spread**, the comparison involves creating a new object by spreading one object onto another. + Option 1: Using the spread operator (`...`) + Option 2: Merging objects using the `Object.assign()` method * For **Comparison**, the comparison involves sorting and comparing the keys of two objects: + Option 1: Sorting keys using `Object.keys()` and then comparing JSON representations + Option 2: Using a library (e.g., Lodash) to compare sorted arrays **Pros and cons** Here's a brief overview of each approach: * **Object.spread**: Using the spread operator (`...`) is generally faster than merging objects using `Object.assign()` because it avoids creating an intermediate object. + Pros: Faster, more concise syntax + Cons: May not work as expected in older browsers or environments that don't support `...` * For **Comparison**, sorting and comparing JSON representations can be slow due to the overhead of JSON parsing and comparison: + Pros: Easy to implement, works across most browsers + Cons: Slow, may not be suitable for performance-critical code **Libraries used** In the **Comparison** test case, the benchmark assumes that a library like Lodash is being used to compare sorted arrays. The exact implementation is not provided in the JSON. **Special JS features or syntax** There are no special JavaScript features or syntax mentioned in the provided benchmark definitions. However, it's worth noting that some modern JavaScript features like `const` and arrow functions may be used in the actual code being tested. **Alternatives** If you're interested in exploring alternative approaches for these benchmarks, here are a few options: * For **Object.spread**, you could try using other spread operators (e.g., `Object.assign()` with two arguments) or explore alternative merge strategies. * For **Comparison**, you might consider using more efficient algorithms for sorting and comparing arrays, such as the Levenshtein distance algorithm or suffix trees. Overall, these benchmarks provide a great opportunity to measure performance differences in various JavaScript scenarios.
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