Benchmark: Number() vs + - MeasureThat.net

Tests:

+
console.log(+'1000');
Number()
console.log(Number('1000'));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
+
Number()

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down what's being tested in the provided JSON benchmark.

The website, MeasureThat.net, is comparing two different ways to convert a string value to a number: using the unary plus operator (`+`) and the `Number()` function.

**Options Being Compared**

1. **Unary Plus Operator (`+`)**: This approach converts the string to a number by adding it as if it were a literal number.
2. **Number() Function**: This built-in JavaScript function converts a string to a number.

**Pros and Cons of Each Approach**

* **Unary Plus Operator (`+`)**
	+ Pros:
		- Faster execution, since it's just a simple arithmetic operation.
		- More intuitive for some developers who might not be familiar with the `Number()` function.
	+ Cons:
		- Can lead to unexpected behavior if the string is not a valid number (e.g., "abc").
* **Number() Function**
	+ Pros:
		- Safer, since it will return NaN (Not a Number) for invalid input strings.
		- More explicit and clear in its intent.
	+ Cons:
		- Slightly slower execution compared to the unary plus operator.

**Library Used**

In this benchmark, no specific library is used beyond the built-in `Number()` function. However, it's worth noting that some libraries (e.g., jQuery) may also provide a similar conversion method using `$()` or `parseInt()`. In this case, we're focused on the browser's built-in implementation.

**Special JS Feature/Syntax**

There are no special JavaScript features or syntax used in these benchmark definitions. They only involve basic arithmetic operations and string manipulation.

**Other Alternatives**

If you need to convert a string to a number, there are other alternatives:

1. **parseInt() Function**: This function can be used with an optional second argument to specify the radix (base) of the input string.
2. ** parseFloat() Function**: Similar to `parseInt()`, but allows for decimal numbers and doesn't require an explicit radix argument.

In summary, MeasureThat.net is testing two common ways to convert a string to a number in JavaScript: using the unary plus operator (`+`) versus the built-in `Number()` function. The results will help developers understand which approach is faster and more reliable for their specific use cases.

Related benchmarks:

Number() vs + (version: 0)

Comparing performance of: + vs Number()

Created: 4 years ago by: Guest

Jump to the latest result

+

Number()

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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