Benchmark: lodash.round VS Math.round (2 decimal places)

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() * 100;

Tests:

Round floating number using lodash round function
for (var i = 0; i < 1000; i++) { _.round(x, 2); }
Round float number with Math.round
for (var i = 0; i < 1000; i++) { Math.round(x * 100) / 100 }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Round floating number using lodash round function
Round float number with Math.round

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark is comparing the performance of two approaches to rounding floating-point numbers: `lodash.round` and `Math.round`. The test is designed to measure which approach is faster on various devices running different versions of Firefox.

**Options Compared**

Two options are compared:

1. **Lodash Round**: Using the `round` function from the Lodash library, specifically `_.round(x, 2)`, where `x` is a random floating-point number between 0 and 100.
2. **Math.Round**: Using the built-in `Math.round` function with the formula `Math.round(x * 100) / 100`, effectively rounding to two decimal places.

**Pros and Cons of Each Approach**

1. **Lodash Round**:
	* Pros: Lodash is a well-maintained, widely-used library that provides a simple and concise way to perform rounding operations.
	* Cons: It requires an external library, which may add overhead due to loading times.
2. **Math.Round**:
	* Pros: Built-in functions are often faster since they don't require loading additional libraries.
	* Cons: The formula `Math.round(x * 100) / 100` is less intuitive and more prone to errors than the Lodash approach.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for various tasks, including numerical operations like rounding. In this benchmark, it's used to provide a simple and efficient way to round floating-point numbers. The `round` function takes two arguments: the number to be rounded (`x`) and the number of decimal places (`2`).

**Special JS Feature/Syntax**

None explicitly mentioned in the provided code snippets.

**Other Considerations**

* **Performance**: Both approaches should have similar performance characteristics, but some devices or browsers might exhibit slight differences.
* **Maintainability**: Using Lodash ensures that the rounding logic is concise and easy to understand, while `Math.round` requires additional knowledge of the underlying formula.

**Alternative Benchmarks**

Other alternatives could involve testing:

* Using a different rounding library (e.g., moment.js)
* Implementing custom rounding logic
* Testing with other browsers or devices

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/117.0

Browser/OS: Firefox 117 on Windows

View result in a separate tab

Test name	Executions per second
Round floating number using lodash round function	1478.3 Ops/sec
Round float number with Math.round	2294264.8 Ops/sec

Related benchmarks:

lodash.round VS Math.round (2 decimal places) (version: 0)

Comparing performance of: Round floating number using lodash round function vs Round float number with Math.round

Created: one year ago by: Guest

Jump to the latest result

Round floating number using lodash round function

Round float number with Math.round

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):