Benchmark: lodash.round VS Math.round (number to 2 decimal )

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 = 4060

Tests:

Round floating number using lodash
for (var i = 0; i < 1000; i++) { _.round(x, -2); }
Round floating number using toFixed()
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 floating number using toFixed()

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 21 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Windows

View result in a separate tab

Test name	Executions per second
Round floating number using lodash	5037.0 Ops/sec
Round floating number using toFixed()	246395.9 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its components.

**Benchmark Overview**

The benchmark is designed to compare two approaches for rounding numbers: `lodash.round` and `Math.round` with `toFixed()`. The goal is to measure which approach is faster for rounding a number to 2 decimal places.

**Options Compared**

Two options are being compared:

1. **`lodash.round`**: A function from the Lodash library that rounds a number to a specified precision. In this case, it's rounded to -2 (which means rounding to 2 decimal places).
2. **`Math.round` with `toFixed()`**: This approach uses the `Math.round()` function to round the number and then applies `toFixed(2)` to format the result as a string with exactly 2 decimal places.

**Pros and Cons**

* **`lodash.round`**:
	+ Pros: Simple, concise, and well-maintained library. Lodash is widely used and respected in the JavaScript community.
	+ Cons: Requires an additional dependency (Lodash) to be included in the test environment.
* **`Math.round` with `toFixed()`**:
	+ Pros: No additional dependencies required, as it's built-in to the JavaScript language. This approach also works on older browsers that don't support Lodash.
	+ Cons: Requires two separate operations (rounding and formatting), which might be slightly less efficient than a single call.

**Library: `lodash`**

Lodash is a popular utility library for JavaScript that provides a wide range of functions for various tasks, such as array manipulation, string templating, and more. In this benchmark, the `_.round` function is used to perform rounding.

**Special JS Feature/Syntax: None**

There are no special JavaScript features or syntax being tested in this benchmark.

**Other Alternatives**

If you were to modify the benchmark to compare other approaches, here are some alternatives:

* Use a different library like Moment.js for rounding numbers.
* Compare with `Number.prototype.round()` instead of `Math.round`.
* Implement your own rounding function from scratch.
* Test additional libraries or built-in functions that can be used for rounding, such as `Decimal.js`.

Keep in mind that when modifying the benchmark, you'll need to consider factors like compatibility, performance, and maintainability.

I hope this explanation helps!

Related benchmarks:

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

round number to 2 decimal

Comparing performance of: Round floating number using lodash vs Round floating number using toFixed()

Created: 2 years ago by: Registered User

Jump to the latest result

Round floating number using lodash

Round floating number using 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):