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Testing array reduce implementations
(version: 0)
Comparing performance of:
Math.max vs Compare
Created:
2 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var values = new Array(5000); for (let i = 0; i < values.length; ++i) { values[i] = { val: i % 20 }; }
Tests:
Math.max
return values.reduce((prev, curr) => { return Math.max(curr.val, prev); }, 0);
Compare
return values.reduce((prev, curr) => { if (curr.val > prev) return curr.val; return prev; }, 0);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Math.max
Compare
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
gemma2:9b
, generated one year ago):
This benchmark compares two different approaches to finding the maximum value within an array of objects using JavaScript's `reduce` method. **Options Compared:** 1. **`Math.max` Approach:** This approach utilizes the built-in `Math.max` function within the `reduce` callback. It iterates through the array, comparing each element's `val` property with the previous maximum value found and returns the largest value encountered. 2. **`Compare` Approach:** This approach implements a custom comparison logic within the `reduce` callback. For each element, it checks if its `val` property is greater than the current maximum value (`prev`) and updates the maximum accordingly. **Pros and Cons:** * **`Math.max` Approach:** * **Pros:** More concise and potentially easier to read. Leveraging built-in functions can sometimes be optimized by the JavaScript engine. * **Cons:** May not be as efficient as the custom comparison approach in certain scenarios, depending on the specific implementation details of `Math.max`. * **`Compare` Approach:** * **Pros:** Offers more explicit control over the comparison logic and might lead to better performance in some cases due to potentially tailored comparisons. * **Cons:** Can be slightly less readable compared to the concise `Math.max` approach. **Other Considerations:** The benchmark results will likely show variations based on factors like: * **JavaScript Engine:** Different engines (e.g., V8, SpiderMonkey) might have varying optimization strategies for these approaches. * **Browser/Environment:** Performance can fluctuate due to browser version, hardware, and other system resources. **Alternatives:** While `reduce` is a powerful method for array transformations, alternatives exist: * **`for` loop:** You could implement the same logic using a traditional `for` loop, which might offer similar performance but often requires more explicit code. * **Libraries:** Some JavaScript libraries (e.g., Lodash) provide utility functions like `_.max()` that handle finding the maximum value efficiently. Let me know if you have any further questions!
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