Benchmark: Convert String to Number parseInt vs +

Script Preparation code:

var testString = "100000";
var testNumber = null;

Tests:

parseInt Conversion
testNumber = Number.parseInt(testString);
+ Conversion
testNumber = +testString

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
parseInt Conversion
+ Conversion

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Windows

View result in a separate tab

Test name	Executions per second
parseInt Conversion	3600515.0 Ops/sec
+ Conversion	6553194.5 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 JSON and explain what is being tested, compared, and the pros/cons of each approach.

**What is being tested?**

MeasureThat.net is testing two different ways to convert a string to a number in JavaScript: using the `parseInt()` function and using the unary plus operator (`+`).

The test cases are designed to measure which method is faster for large strings. The first test case uses `parseInt()` to convert a string to a number, while the second test case uses the unary plus operator (`+`) to achieve the same result.

**Options compared**

There are two main options being compared:

1. **`parseInt()` function**: This function converts a string to a number by parsing it according to a radix (base). The default radix is 10 for decimal numbers.
2. **Unary plus operator (`+`)**: This operator coerces the value of an expression to a number.

**Pros and cons**

1. `parseInt()` function:
	* Pros:
		+ Can handle strings in different bases (e.g., hexadecimal, octal).
		+ Returns `NaN` if the string cannot be converted to a number.
	* Cons:
		+ Can be slower than using the unary plus operator for simple decimal conversions.
2. Unary plus operator (`+`):
	* Pros:
		+ Fast and efficient for simple decimal conversions.
		+ Does not return `NaN` like `parseInt()` does if the conversion fails.
	* Cons:
		+ Does not handle strings in different bases.

**Library usage**

None of the test cases use any external libraries.

**Special JavaScript feature or syntax**

The test case uses a special JavaScript feature called **"Raw UA String"**, which is used to specify the user agent (browser) string. This allows MeasureThat.net to analyze data from different browsers and operating systems.

However, if we look at the individual test cases, there are no specific mentions of any special JavaScript features or syntax being tested.

**Other alternatives**

If you were to create similar benchmarks for other operations, here are some alternative approaches:

* Converting a string to uppercase or lowercase.
* Checking if a value is an integer using `Number.isInteger()`.
* Using template literals (`${value}`) instead of concatenation or `+` for simple string manipulations.

Keep in mind that these alternatives would require creating new test cases and adjusting the benchmark preparation code accordingly.

Related benchmarks:

Convert String to Number parseInt vs + (version: 0)

Comparing performance of: parseInt Conversion vs + Conversion

Created: one year ago by: Guest

Jump to the latest result

parseInt Conversion

+ Conversion

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):