Benchmark: Convert string to number

Tests:

+
let converted = +'100'
parseInt
let converted = parseInt('100')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
+
parseInt

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
+	239802832.0 Ops/sec
parseInt	22138124.0 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 definition and test cases.

**Benchmark Definition**

The benchmark is to measure the performance of converting a string to a number. There are two approaches:

1. Using the unary plus operator (`+`)
2. Using the `parseInt()` function

**Options Compared**

Two options are being compared:

* **Unary Plus Operator (`+`)**: This method directly converts the string to an integer by adding it to zero.
* **parseInt() Function**: This method also converts the string to a number, but with more flexibility (e.g., allowing for decimal numbers and handling leading zeros).

**Pros and Cons**

1. **Unary Plus Operator (`+`)**:
	* Pros: Simple, fast, and widely supported across browsers.
	* Cons: Can lead to precision issues if the input string contains decimal points or scientific notation.
2. **parseInt() Function**:
	* Pros: More flexible, handles leading zeros, and can convert strings with decimal points or scientific notation.
	* Cons: May be slower due to the parsing process.

**Library and Purpose**

None of the test cases use any external libraries. However, it's worth noting that `parseInt()` is a built-in JavaScript function, so no additional library is required.

**Special JS Features or Syntax**

The test cases do not use any special JavaScript features or syntax beyond what's necessary for the benchmarks.

**Other Alternatives**

For converting strings to numbers, other approaches could include:

* Using the `Number()` function (a synonym for `parseInt()` in some browsers)
* Using a regular expression to extract and parse the numeric value from the string
* Using a library like Moment.js for handling date and time conversions

Keep in mind that these alternatives might introduce additional dependencies or complexity.

**Benchmark Preparation Code**

Since there is no preparation code provided, it's likely that the benchmark framework will handle initialization and setup automatically.

Overall, this benchmark compares two simple but common approaches to converting strings to numbers. Understanding the trade-offs between speed, precision, and flexibility can help developers choose the best approach for their specific use cases.

Related benchmarks:

Convert string to number (version: 0)

Perform string number to number type

Comparing performance of: + vs parseInt

Created: 2 years ago by: Guest

Jump to the latest result

+

parseInt

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):