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toFixed vs toPrecision vs Math.round() asd
(version: 0)
Comparing performance of:
toFixed(4) vs (Math.round(*10000)/10000).toString()
Created:
4 years ago
by:
Guest
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Script Preparation code:
var someFloat = 0.123456789;
Tests:
toFixed(4)
someFloat.toFixed(0);
(Math.round(*10000)/10000).toString()
Math.round(someFloat);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
toFixed(4)
(Math.round(*10000)/10000).toString()
Fastest:
N/A
Slowest:
N/A
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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, along with the pros and cons of different approaches. **Benchmark Overview** The benchmark measures the performance of three different methods for rounding numbers: 1. `toFixed(4)` 2. `(Math.round(*10000)/10000).toString()` 3. `Math.round(someFloat)` These methods are compared to determine which one is the fastest on a given machine running Firefox 89. **Options Compared** The two options being compared are: A) `toFixed(4)` - This method uses the built-in `toFixed` function to round the number to the specified precision (in this case, 4 decimal places). B) `(Math.round(*10000)/10000).toString()` - This method uses a mathematical trick to first scale up the number by multiplying it by 10,000, then rounding it using `Math.round`, and finally scaling it back down by dividing by 10,000. The result is converted to a string using `toString()`. **Pros and Cons of Each Approach** A) `toFixed(4)`: Pros: * Simple and intuitive * Built-in function in JavaScript * Easy to read and maintain Cons: * May introduce rounding errors due to the underlying algorithm used by `toFixed` * Can be slower than other methods for very large numbers B) `(Math.round(*10000)/10000).toString()`: Pros: * Avoids potential rounding errors of `toFixed` (though this method still has its own quirks) * Can be faster for very large numbers due to avoiding intermediate calculations * Portable across different JavaScript engines and platforms Cons: * Less intuitive and more complex than `toFixed` * Requires additional mathematical operations, which can be slower for smaller numbers **Library and Purpose** There is no explicit library mentioned in the benchmark definition. However, it's worth noting that the use of `Math.round` and `toString()` suggests that the benchmark is using a subset of the JavaScript Math API. **Special JS Feature or Syntax** None are explicitly used in this benchmark. **Other Alternatives** Other methods for rounding numbers include: * Using `Number.EPSILON` to estimate the smallest possible difference between two numbers * Implementing a custom rounding algorithm using bit manipulation (e.g., using `Integer.bitwiseAND` and `Integer.bitwiseOR`) Keep in mind that these alternatives might not be as widely supported or optimized as the methods used in this benchmark. **Benchmark Preparation Code** The preparation code provided creates a variable `someFloat` with a value of 0.123456789, which is then used as input for the rounding functions being tested. Overall, this benchmark provides a good example of how to compare different methods for rounding numbers and highlights the importance of considering performance, precision, and portability when choosing a method.
Related benchmarks:
toFixed vs Math.round() - result as a number
toFixed vs toPrecision vs Math.round() to 1 decimal place
toFixed vs toPrecision vs Math.round() 2 decimal
toFixed vs toPrecision vs Math.round() 22222
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