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toFixed -> Number vs Math.round
(version: 0)
Comparing performance of:
toFixed vs Math.round
Created:
5 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var someFloat = 0.123456789;
Tests:
toFixed
Number(someFloat.toFixed(4));
Math.round
Math.round(someFloat)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
toFixed
Math.round
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to help you understand the JavaScript benchmark on MeasureThat.net. **What is tested?** The benchmark measures the performance difference between two approaches for converting a decimal number to an integer: `Number(someFloat.toFixed(4))` and `Math.round(someFloat)`. The test uses a fixed value of `someFloat = 0.123456789`. **Options compared** There are two options being compared: 1. **`Number(someFloat.toFixed(4))`**: This approach uses the `toFixed()` method to convert the decimal number to a string, and then passes it to the `Number()` constructor to convert it back to a number. 2. **`Math.round(someFloat)`**: This approach uses the `Math.round()` function to round the decimal number to the nearest integer. **Pros and cons of each approach** 1. **`Number(someFloat.toFixed(4))`**: * Pros: Can handle fractional parts, allows for precise control over rounding. * Cons: May be slower due to string conversion, requires explicit rounding parameter (4 in this case). 2. **`Math.round(someFloat)`**: * Pros: Faster and more concise, uses built-in function for rounding. * Cons: May not handle fractional parts accurately, rounds to the nearest integer without specifying the number of decimal places. **Library usage** None of the benchmark tests explicitly use any JavaScript libraries. **Special JS feature or syntax** There is no special JavaScript feature or syntax used in this benchmark. The test only focuses on comparing two basic arithmetic operations. **Other alternatives** For more complex rounding scenarios, alternative approaches might include: * Using the `decimal` library to perform decimal arithmetic. * Implementing a custom rounding algorithm using bitwise operations (e.g., using `>>> 0` for round down and `<< 0` for round up). * Utilizing a specialized rounding library like `round.js`. Keep in mind that these alternatives might not be necessary for simple use cases, but can provide more flexibility or control over the rounding process. I hope this explanation helps! Let me know if you have any further questions.
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