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Precision rounding
(version: 0)
Comparing performance of:
toFixed vs bitwise
Created:
4 years ago
by:
Registered User
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Script Preparation code:
var someFloat = 0.9324454646443
Tests:
toFixed
someFloat.toFixed(4)
bitwise
~~(someFloat * 100000) / 1000
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
toFixed
bitwise
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 dive into the explanation of the provided benchmark. **What is being tested?** MeasureThat.net is testing two different approaches to precision rounding: `toFixed` and `bitwise`. The goal is to compare the performance of these two methods in JavaScript, which is used for both calculations and string formatting. **Options compared** The benchmark is comparing two options: 1. **`toFixed(4)`**: This method rounds the number to 4 decimal places using a fixed-point notation. 2. **`~~(someFloat * 100000) / 1000`**: This method uses bitwise operations to achieve similar results. **Pros and Cons** * `toFixed(4)`: + Pros: Human-readable output, easy to understand and maintain. + Cons: May lead to precision issues due to rounding errors, can be slower than other methods. * `~~(someFloat * 100000) / 1000`: + Pros: Faster execution time compared to `toFixed`, more precise results due to avoiding rounding errors. + Cons: Requires manual calculation of the multiplier (100000), harder to understand and maintain. **Library used** There is no specific library mentioned in the provided benchmark. However, it's worth noting that MeasureThat.net often uses various libraries for benchmarking, such as `fast-locale-compare` for locale-specific comparisons or `mathjs` for numerical calculations. **Special JS features/syntax** The benchmark does not explicitly use any special JavaScript features or syntax beyond the methods being tested. However, it's worth noting that using bitwise operations (`~~`) is a lesser-known feature in JavaScript that can be useful in certain situations. **Other considerations** * The benchmark uses a fixed number (`someFloat = 0.9324454646443`) as input to demonstrate the precision rounding behavior. * MeasureThat.net often runs multiple iterations of each test case to provide more accurate results and account for any variations in performance. * The benchmark is designed to be platform-agnostic, with test cases run on various browsers (Safari) and operating systems (Mac OS X). **Alternatives** Other alternatives for precision rounding or similar benchmarks might include: 1. Using a library like `decimal.js` or `mathjs` for more precise numerical calculations. 2. Implementing custom logic using arithmetic operations instead of relying on built-in methods like `toFixed`. 3. Testing other methods, such as `toPrecision()` or `toFixed()` with different precision values. Keep in mind that the choice of approach depends on the specific requirements and constraints of your project.
Related benchmarks:
toFixed vs Math.round() - result as a number
Rounding to precision
To fixed vs round vs to precision with float
toFixed vs toPrecision vs Math.round() to 1 decimal place
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