Benchmark: parseInt vs Number string to number

Script Preparation code:

const stringNum = "42";

Tests:

parseInt
const res = parseInt(42, 10) ;
Number
const res = Number(42);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
parseInt
Number

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The website uses a JSON object to define a benchmark, which includes the following information:

* `Name`: The name of the benchmark (in this case, "parseInt vs Number string to number").
* `Description`: An empty string, indicating that no description is provided for this benchmark.
* `Script Preparation Code`: A script that sets up a constant variable `stringNum` with the value `"42"`.
* `Html Preparation Code`: An empty string, indicating that no HTML preparation code is needed.

**Individual Test Cases**

The benchmark consists of two test cases:

1. `parseInt`
2. `Number`

Both test cases perform the same operation: converting a string to an integer using either the `parseInt` function or the built-in `Number` function.

**Options Compared**

In this case, we have two options being compared:

* `parseInt(stringNum, 10)`: Using the `parseInt` function with a radix of 10 (decimal).
* `Number(stringNum)`: Using the built-in `Number` function without specifying a radix.

**Pros and Cons**

Here are some pros and cons for each approach:

* `parseInt(stringNum, 10)`:
	+ Pros:
		- Can be more efficient for decimal inputs, as it allows the browser to handle fractional parts.
		- Provides better error handling, as it returns NaN (Not a Number) if the input is not a valid integer.
	+ Cons:
		- May be slower for non-decimal inputs, as it performs additional validation.
* `Number(stringNum)`:
	+ Pros:
		- Generally faster and more concise than using `parseInt`.
	+ Cons:
		- Returns NaN (Not a Number) if the input is not a valid integer.
		- May be less efficient for decimal inputs.

**Library/Features Used**

In this benchmark, we're using:

* The built-in `Number` function to perform string-to-number conversion.
* The `parseInt` function with a radix of 10 (decimal).

There are no libraries or special JavaScript features used in this benchmark.

**Other Considerations**

When choosing between `parseInt` and `Number`, consider the following factors:

* Input validation: If you need to validate inputs for invalid integers, use `parseInt`.
* Performance: For most cases, `Number` is sufficient and faster.
* Error handling: If you want to handle errors differently, use `parseInt`.

**Alternatives**

Other alternatives for string-to-number conversion include:

* Using a library like Lodash's `toNumber()` or Moment.js's `toNumber()`.
* Implementing your own custom function using regular expressions or arithmetic operations.

Keep in mind that the performance differences between these approaches may be negligible unless you're working with extremely large datasets.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Browser/OS: Chrome 105 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
parseInt	16671713.0 Ops/sec
Number	16748137.0 Ops/sec

Related benchmarks:

parseInt vs Number string to number (version: 0)

Comparing performance of: parseInt vs Number

Created: 2 years ago by: Guest

Jump to the latest result

parseInt

Number

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):