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toFixed vs toPrecision vs Math.round() 22222
(version: 0)
Comparing performance of:
toFixed(2) vs Round
Created:
3 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var someFloat = 0.123456789;
Tests:
toFixed(2)
someFloat.toFixed(2)
Round
Math.round(someFloat*100) / 100
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
toFixed(2)
Round
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36
Browser/OS:
Chrome 137 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=612523" width="100%" height="500px"></iframe>
Round
281.0M/s
toFixed(2)
34.5M/s
View exact numbers
Test name
Executions per second
✓
Round
280,984,096 Ops/sec
toFixed(2)
34,522,796 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and explain what is being tested, compared options, pros and cons of each approach, library usage, special JS features or syntax, and other considerations. **What is being tested?** The provided JSON represents two test cases for a JavaScript microbenchmark: 1. `toFixed(2)`: This benchmark tests the performance of using the `toFixed()` method to round a floating-point number to 2 decimal places. 2. `Math.round()`: This benchmark tests the performance of using the `Math.round()` function to round a floating-point number. **Comparison options:** The two approaches being compared are: 1. **`toFixed(2)`**: This approach uses the `toFixed()` method, which rounds the number to the specified number of decimal places. 2. **`Math.round()`: This approach uses the `Math.round()` function, which rounds the number to the nearest integer. **Pros and cons of each approach:** 1. **`toFixed(2)`**: * Pros: + Can be more readable and intuitive for developers who are familiar with the `toFixed()` method. + May perform better due to its ability to optimize rounding. * Cons: + May not work correctly for all edge cases, such as very large or very small numbers. 2. **`Math.round()`:** * Pros: + More versatile and can handle a wider range of input values. + Less prone to errors due to its explicit rounding behavior. * Cons: + May be less readable for developers who are not familiar with the `Math.round()` function. **Library usage:** There is no library mentioned in the provided JSON. However, some JavaScript libraries may use or rely on the `toFixed()` method or `Math.round()` function internally. **Special JS features or syntax:** None of the provided test cases uses special JavaScript features or syntax beyond standard JavaScript functions and operators. **Other considerations:** 1. **Number precision:** The benchmark assumes that the input number is a floating-point value with a limited number of decimal places (in this case, 22). However, in real-world scenarios, numbers can have more decimal places. 2. **Browser variability:** The benchmark uses Firefox as the browser and measures performance on different devices (Desktop). This may not accurately represent performance in other browsers or environments. **Alternatives:** Other alternatives for rounding numbers include: 1. **`Number.EPSILON`:** A small value that can be used to determine if two numbers are close enough to be considered equal. 2. **`decimal.js`:** A library for working with decimal arithmetic, which provides a range of rounding algorithms and options. 3. **`BigInt`:** A JavaScript primitive type for representing large integers, which can be useful for calculations that require precise control over rounding. These alternatives may offer better performance or more flexibility than the `toFixed()` method or `Math.round()` function in certain situations.
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
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