Benchmark: lodash.round VS toFixed() VS toFixed() and parseFloat

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 = 5.236;

Tests:

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

Historical Performance Data aggregated from 118 community runs

Desktop Results:

Chrome 104 runs

Round floating number using toFixed()

8K/s

Round floating number using toFixed() and parseFloat

5K/s

Round floating number using lodash round function

3K/s

Fastest: Round floating number using toFixed() (3.0x faster)

View exact numbers

✓ Round floating number using toFixed(): 8,156 ops/sec
• Round floating number using toFixed() and parseFloat: 4,789 ops/sec
• Round floating number using lodash round function: 2,719 ops/sec

Firefox 9 runs

Round floating number using toFixed()

23K/s

Round floating number using toFixed() and parseFloat

14K/s

Round floating number using lodash round function

2K/s

Fastest: Round floating number using toFixed() (10.9x faster)

View exact numbers

✓ Round floating number using toFixed(): 22,639 ops/sec
• Round floating number using toFixed() and parseFloat: 14,048 ops/sec
• Round floating number using lodash round function: 2,080 ops/sec

Safari 5 runs

Round floating number using toFixed()

10K/s

Round floating number using toFixed() and parseFloat

6K/s

Round floating number using lodash round function

2K/s

Fastest: Round floating number using toFixed() (4.2x faster)

View exact numbers

✓ Round floating number using toFixed(): 9,972 ops/sec
• Round floating number using toFixed() and parseFloat: 5,834 ops/sec
• Round floating number using lodash round function: 2,390 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Round floating number using lodash round function
Round floating number using toFixed()
Round floating number using toFixed() and parseFloat

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36 Edg/147.0.0.0

Browser/OS: Chrome 147 on Windows

View result in a separate tab

Round floating number using toFixed()

7K/s

Round floating number using toFixed() and parseFloat

4K/s

Round floating number using lodash round function

1K/s

View exact numbers

Test name	Executions per second
✓ Round floating number using toFixed()	6,663 Ops/sec
Round floating number using toFixed() and parseFloat	4,302 Ops/sec
Round floating number using lodash round function	1,234 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what's being tested, compared, and the pros/cons of each approach.

**Benchmark Definition**

The benchmark is comparing three approaches to rounding floating-point numbers:

1. `_.round(x, 2)` using the Lodash library
2. `x.toFixed(2)`
3. `parseFloat(x.toFixed(2))`

**Lodash Library**

The Lodash library is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, string normalization, and more. The `round` function in particular is used to round numbers to a specified number of decimal places.

**Options Comparison**

Here's a brief comparison of the three approaches:

1. **`.round(x, 2)` (Lodash)**: This approach uses the Lodash library's `round` function to round the floating-point number `x` to 2 decimal places. The pros include:
	* A simple and concise way to round numbers.
	* Built-in rounding behavior with no need for manual calculation.
	Cons:
	* Requires the inclusion of the Lodash library in the test code, which may not be desirable for all projects.
	* May have a slight performance overhead due to the function call.
2. **`x.toFixed(2)`**: This approach uses the `toFixed()` method on the `x` variable to format it as a string with 2 decimal places. The pros include:
	* Native JavaScript implementation, eliminating the need for an external library.
	* Fast and efficient, as it leverages the browser's built-in formatting capabilities.
Cons:
	* May not work correctly if the input is not a number or if the desired precision is higher than 2 decimal places.
3. **`parseFloat(x.toFixed(2))`**: This approach first formats `x` as a string with 2 decimal places using `toFixed()` and then converts it back to a float using `parseFloat()`. The pros include:
	* Eliminates the need for the Lodash library.
Cons:
	* More computationally expensive than the other two approaches, as it involves an extra function call and conversion step.

**Special JavaScript Feature**

There is no special JavaScript feature or syntax mentioned in this benchmark. All three approaches rely on standard JavaScript methods and libraries.

**Other Alternatives**

If you want to explore alternative rounding strategies, consider:

1. **Using a decimal arithmetic library**: Libraries like Decimal.js provide precise decimal arithmetic, which can be useful for financial calculations.
2. **Implementing your own rounding algorithm**: If performance is critical, you could implement a custom rounding algorithm using bitwise operations or other low-level techniques.

Keep in mind that the choice of rounding approach depends on the specific requirements and constraints of your project.

lodash.round VS toFixed() VS toFixed() and parseFloat (version: 0)

Compare round lodash function vs javascript native toFixed() function

Comparing performance of: `Round floating number using lodash round function vs Round floating number using toFixed() vs Round floating number using toFixed() and parseFloat`

Created: 7 years ago by: Guest

Go to the latest result

Round floating number using lodash round function

Round floating number using toFixed()

Round floating number using toFixed() and parseFloat

Historical Performance Data aggregated from 118 community runs

Desktop Results:

Chrome 104 runs

Firefox 9 runs

Safari 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

lodash.round VS toFixed() VS toFixed() and parseFloat (version: 0)

Compare round lodash function vs javascript native toFixed() function

Comparing performance of: Round floating number using lodash round function vs Round floating number using toFixed() vs Round floating number using toFixed() and parseFloat

Created: 7 years ago by: Guest

Go to the latest result

Round floating number using lodash round function

Round floating number using toFixed()

Round floating number using toFixed() and parseFloat

Historical Performance Data aggregated from 118 community runs

Desktop Results:

Chrome 104 runs

Firefox 9 runs

Safari 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `Round floating number using lodash round function vs Round floating number using toFixed() vs Round floating number using toFixed() and parseFloat`