Benchmark: float vs tofixed

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var x = Math.random();

Tests:

floor
for (var i = 0; i < 1000; i++) { Math.floor(x) }
toFixed
for (var i = 0; i < 1000; i++) { x.toFixed(); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
floor
toFixed

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36 Edg/89.0.774.45

Browser/OS: Chrome 89 on Windows

View result in a separate tab

Test name	Executions per second
floor	3272.0 Ops/sec
toFixed	3556.7 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition**

The provided benchmark definition json represents a test case that compares two approaches to round numbers in JavaScript: using Lodash's `round` function and JavaScript's native `toFixed` method. The test is designed to measure which approach is faster for rounding a large number of values.

**Script Preparation Code**

Before running the benchmarks, the script preparation code generates a random value `x` using `Math.random()`. This ensures that both tests start with the same initial value and eliminates any potential bias towards one implementation over the other.

**Html Preparation Code**

The HTML preparation code includes a reference to Lodash's minified JavaScript file (`lodash.min.js`) via a CDN. This allows users to easily integrate Lodash into their testing environment.

**Individual Test Cases**

There are two test cases:

1. **floor**: This test case measures the time it takes to round a large number of values using `Math.floor`. The `for` loop iterates 1000 times, and each iteration performs `Math.floor(x)`.
2. **toFixed**: This test case measures the time it takes to round a large number of values using JavaScript's native `toFixed` method. Again, the `for` loop iterates 1000 times, and each iteration performs `x.toFixed()`.

**Pros and Cons**

*   **Lodash's round function**:
    *   Pros: Lodash's `round` function is a more readable and maintainable way to round numbers. It also provides more control over the rounding behavior.
    *   Cons: Using an external library may introduce additional overhead due to parsing and serialization, which can affect performance in microbenchmarking scenarios.
*   **JavaScript's native toFixed method**:
    *   Pros: The `toFixed` method is a built-in JavaScript function that requires no extra libraries or processing. This makes it potentially faster for very large numbers of iterations.
    *   Cons: Using the `toFixed` method can be less readable and more error-prone than using Lodash's `round` function.

**Library - Lodash**

Lodash is a popular utility library for JavaScript that provides a wide range of functions for tasks such as string manipulation, array operations, and more. In this case, Lodash's `round` function is used to round numbers. The library is designed to be lightweight and efficient, making it suitable for use in microbenchmarking scenarios.

**Special JS Feature - none**

There are no special JavaScript features or syntaxes being tested in this benchmark. The focus is on comparing the performance of two rounding approaches using simple arithmetic operations.

**Alternatives**

If you want to explore alternative ways to round numbers in JavaScript, here are a few options:

*   Using a library like [mathjs](https://github.com/josdejong/mathjs) which provides more advanced mathematical functions.
*   Implementing custom rounding logic using bitwise operators or arithmetic expressions.
*   Using a different data type, such as `Int32Array` or `Float64Array`, to perform the rounding operation.

Keep in mind that these alternatives may not provide significant performance improvements over the native `toFixed` method for small-scale applications.

Related benchmarks:

float vs tofixed (version: 0)

Compare round lodash function vs javascript native toFixed() function

Comparing performance of: floor vs toFixed

Created: 3 years ago by: Guest

Jump to the latest result

floor

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):