Benchmark: test floor vs toFixed

Tests:

round
Math.round(5.5681 * 100) / 100
toFixed
Number(5.5681.toFixed(2))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
round
toFixed

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.99 Safari/537.36

Browser/OS: Chrome 97 on Linux

View result in a separate tab

Test name	Executions per second
round	8941089.0 Ops/sec
toFixed	2618375.5 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

**What is being tested?**

The provided JSON represents two test cases for JavaScript microbenchmarks on MeasureThat.net. The tests aim to compare the performance of two methods: `Math.round()` and `toFixed()`.

**Options compared:**

1. **`Math.round(5.5681 * 100) / 100`**: This option uses the `Math.round()` function to round a number to the nearest integer, after multiplying it by 100.
2. **`Number(5.5681.toFixed(2))`**: This option uses the `toFixed()` method to format a number as a string with two decimal places, and then converts it back to a number using the `Number()` function.

**Pros and Cons of each approach:**

1. **`Math.round()`**:
	* Pros:
		+ Generally faster than `toFixed()` because it only requires a single multiplication and division operation.
		+ Can be more efficient for large numbers or high-precision calculations.
	* Cons:
		+ Requires two operations (multiplication and division) to get the desired result.
		+ May not provide the exact decimal value, especially for non-integer results.
2. **`toFixed()`**:
	* Pros:
		+ Provides a more straightforward way to format numbers with a specific number of decimal places.
		+ Can be useful when working with strings or formatting output.
	* Cons:
		+ Typically slower than `Math.round()` because it involves creating a new string and parsing the result.
		+ Requires two operations (conversion and parsing) to get the desired result.

**Library:**

There is no explicit library mentioned in this benchmark. However, the `Number()` function is used, which is part of the JavaScript standard library.

**Special JS feature or syntax:**

None are explicitly mentioned. However, the use of the `toFixed()` method requires an understanding of string formatting and parsing in JavaScript.

**Other alternatives:**

If you need to compare other methods for rounding numbers, some alternative approaches might include:

1. **`decimal` library**: A popular JavaScript library for precise decimal arithmetic.
2. **`BigInt`**: A built-in JavaScript feature for working with integers and arbitrary-precision arithmetic.
3. **Third-party libraries**: Such as ` numeral.js` or `mathjs`, which provide more advanced numerical computing capabilities.

Keep in mind that the choice of method depends on the specific requirements of your project, such as performance, precision, or readability.

Related benchmarks:

test floor vs toFixed (version: 0)

Comparing performance of: round vs toFixed

Created: 2 years ago by: Guest

Jump to the latest result

round

toFixed

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):