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toFixed vs math
(version: 0)
Comparing performance of:
toFixed vs trunc
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var x = 0.123456
Tests:
toFixed
+x.toFixed(2)
trunc
Math.trunc(x * 100) / 100
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
toFixed
trunc
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 break down the benchmark and explain what's being tested. **Benchmark Overview** The test compares two approaches to format a floating-point number: using the `toFixed()` method or calculating the truncated value manually. The goal is to determine which approach is faster in JavaScript. **Options Compared** There are two options being compared: 1. **`toFixed(2)`**: This uses the `toFixed()` method to round the float to 2 decimal places. The number of decimal places can affect performance. 2. **`Math.trunc(x * 100) / 100`**: This manually calculates the truncated value by multiplying the float by 100, truncating the result using `Math.trunc()`, and then dividing by 100. **Pros and Cons** * **`toFixed(2)`**: + Pros: Easy to implement and maintain. The method is widely supported and provides a clear understanding of the desired output. + Cons: May incur overhead due to the rounding process, which can lead to slower performance compared to manual calculations. * **`Math.trunc(x * 100) / 100`**: + Pros: Can be faster than `toFixed()` since it avoids the rounding process. This approach relies on understanding how floating-point numbers are represented in binary. + Cons: More complex and may require more careful implementation to ensure accurate results. **Library** The benchmark uses none, but if we consider the `Math` library, its purpose is to provide mathematical functions for performing operations like exponentiation, logarithms, trigonometry, and so on. In this case, `Math.trunc()` is used to truncate a number. **Special JS Feature/Syntax** There's no special JavaScript feature or syntax being tested in this benchmark. It only focuses on the performance comparison between two different approaches. **Alternative Approaches** Other possible alternatives for formatting floating-point numbers include: * Using scientific notation (e.g., `x.toExponential()`) * Using a third-party library like jQuery or Moment.js * Implementing custom rounding logic using bitwise operations However, these alternatives are not being tested in this benchmark.
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toFixed vs Math.round() - result as a number
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toFixed vs toPrecision vs Math.round() 22222
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