Benchmark: parseInt vs toString vs unary(+)

Script Preparation code:

var numbers = [1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789];
var strNumbers = ["1", "12", "123", "1234", "12345", "123456", "1234567", "12345678", "123456789"];

Tests:

parseInt a number
numbers.forEach(n => parseInt(n, 10));
parseInt a string
strNumbers.forEach(n => parseInt(n, 10));
toString a number
numbers.forEach(n => n.toString());
toString a string
strNumbers.forEach(n => n.toString());
unery convert to number from number
numbers.forEach(n => +n);
unery convert to number from string
strNumbers.forEach(n => +n);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
parseInt a number
parseInt a string
toString a number
toString a string
unery convert to number from number
unery convert to number from string

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the explanation.

**Benchmark Overview**

The MeasureThat.net benchmark is designed to compare the performance of three different approaches for converting numbers and strings between two formats: numbers and strings. The test cases are:

1. `parseInt` (converting a number or string to an integer)
2. `toString` (converting a number to a string)
3. `unary+` (converting a number or string to a number, using the unary plus operator)

**Benchmark Options**

The benchmark compares the performance of each option in the following test cases:

* `parseInt`: converting numbers and strings to integers
* `toString`: converting numbers to strings
* `unary+`: converting numbers and strings to numbers (using the unary plus operator)

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1. `parseInt`:
	* Pros: Simple, widely supported, and efficient for large integers.
	* Cons: May lose precision when converting very large or very small numbers.
2. `toString`:
	* Pros: Easy to implement, works well for small integers and strings.
	* Cons: Can be slower than `parseInt` for large integers and may not work as expected with certain edge cases (e.g., NaN values).
3. `unary+`:
	* Pros: Generally faster than `parseInt`, especially for strings, and can handle a wider range of input types.
	* Cons: May lose precision when converting very small or very large numbers.

**Library**

In the benchmark code, we notice that both arrays (`numbers` and `strNumbers`) are used to test each approach. The libraries used in this case are:

1. None (builtin JavaScript)
2. None (built-in JavaScript)

However, it's worth noting that if the test cases were using external libraries or dependencies, such as a parsing library for integers or a string manipulation library, those would need to be considered when interpreting the benchmark results.

**Special JS Features**

There are no special JavaScript features or syntax used in this benchmark. The focus is on comparing the performance of three fundamental operations: `parseInt`, `toString`, and unary+.

**Alternatives**

For alternatives to MeasureThat.net, you can consider:

1.Benchmarking frameworks like Benchmark.js or js-benchmark.
2. Browser-specific performance comparison tools like Chrome DevTools' performance analysis.
3. Node.js built-in benchmarking modules like child_process's performance profiling capabilities.

Keep in mind that these alternatives may have different strengths and weaknesses compared to MeasureThat.net, but they can provide similar functionality for comparing JavaScript performance benchmarks.

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser/OS: Chrome 126 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
parseInt a number	1635858.9 Ops/sec
parseInt a string	1426111.9 Ops/sec
toString a number	13562867.0 Ops/sec
toString a string	13147302.0 Ops/sec
unery convert to number from number	25559044.0 Ops/sec
unery convert to number from string	10008942.0 Ops/sec

Related benchmarks:

parseInt vs toString vs unary(+) (version: 0)

Comparing performance of: parseInt a number vs parseInt a string vs toString a number vs toString a string vs unery convert to number from number vs unery convert to number from string

Created: 4 years ago by: Guest

Jump to the latest result

parseInt a number

parseInt a string

toString a number

toString a string

unery convert to number from number

unery convert to number from string

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):