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Math.abs vs binary Math.abs
(version: 0)
comparers Math.abs vs binary ( nr ^ (nr >> 31) - (nr >> 31)) )
Comparing performance of:
Math.abs vs binary
Created:
2 years ago
by:
Guest
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Script Preparation code:
var nr = -8765
Tests:
Math.abs
var result = Math.abs(nr)
binary
var result = nr ^ (nr >> 31) - (nr >> 31)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Math.abs
binary
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
gemma2:9b
, generated one year ago):
This benchmark compares the performance of JavaScript's built-in `Math.abs()` function against a manually implemented binary method for calculating the absolute value of a number. **Options Compared:** * **`Math.abs(nr)`:** The standard JavaScript function to find the absolute value of a number. This is generally considered the most straightforward and readable approach. * **`nr ^ (nr >> 31) - (nr >> 31)`:** A bitwise operation-based method for calculating the absolute value. It leverages the fact that the sign bit of a signed integer determines its polarity. **Pros/Cons:** * **`Math.abs()`:** * **Pros:** Simple, readable, widely understood, built into JavaScript. * **Cons:** May have slightly higher overhead due to being a function call. * **Binary Method:** * **Pros:** Potentially faster as it avoids function calls and relies on direct bit manipulation. * **Cons:** Less readable, can be harder to debug, might not be as efficient in all cases (e.g., depending on the JavaScript engine's optimizations). **Other Considerations:** * **JavaScript Engine Optimizations:** Modern JavaScript engines are highly optimized and may internally use similar techniques to the binary method for `Math.abs()`. Therefore, in practice, the performance difference might be negligible. * **Readability vs. Performance:** For most applications, the slight potential speed gain of the binary method is unlikely to outweigh the benefits of using the more readable and standard `Math.abs()` function. **Alternatives:** There are other ways to calculate absolute values in JavaScript, but they generally wouldn't be faster than the options presented here.
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