Benchmark: parseInt vs Number, number from ID

Script Preparation code:

var id = "12345";

Tests:

parseInt
const idN = parseInt(id, 10);
Number
const idN = Number(id);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
parseInt
Number

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser/OS: Chrome 110 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
parseInt	9820437.0 Ops/sec
Number	10056483.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the benchmark and explain what's being tested, the different approaches compared, their pros and cons, and other considerations.

**Benchmark Overview**

The benchmark is comparing two methods to convert a string ID to an integer number: `parseInt` and `Number`. The benchmark is run on various browsers (Chrome 110) on a Mac OS X platform.

**Methods Compared**

1. **parseInt**: This method takes two arguments: the value to be parsed and the radix (base). In this case, the radix is set to 10, which means decimal.
2. **Number**: This method simply converts the string to an integer without specifying a radix.

**Pros and Cons of Each Approach**

1. **parseInt**:
	* Pros:
		+ Can handle strings in different bases (e.g., hexadecimal, octal).
		+ Allows for explicit conversion to a specific base.
	* Cons:
		+ Can be slower due to the overhead of parsing the radix.
2. **Number**:
	* Pros:
		+ Faster execution since it doesn't require parsing a radix.
	* Cons:
		+ May not work correctly with strings in different bases.

**Library and Special JS Features**

There are no libraries or special JavaScript features mentioned in this benchmark. Both `parseInt` and `Number` are built-in functions.

**Other Considerations**

The benchmark assumes that the input string `id` is a valid integer representation (e.g., "12345"). If the input can be a non-integer value, additional error handling would be necessary.

**Alternatives**

If you need to convert a string ID to an integer number in JavaScript, you might also consider using:

1. **parseInt() with optional radix**: This allows for more flexibility in converting strings to integers.
2. **Decimal.js library**: A library that provides decimal arithmetic support, including conversion from strings to numbers.

In general, the choice between `parseInt` and `Number` depends on your specific use case and requirements. If you need to handle strings in different bases or require explicit control over the conversion process, `parseInt` might be a better choice. Otherwise, `Number` is a simpler and faster option.

Related benchmarks:

parseInt vs Number, number from ID (version: 0)

Comparing performance of: parseInt vs Number

Created: one year 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 one month ago):