Benchmark: parse to int or Number

Tests:

Number
return Array.from('123').map(Number)
ParseInt
return Array.from('123').map((string) => parseInt(string))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Number
ParseInt

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 dive into the world of JavaScript microbenchmarks and explain what's being tested in this specific benchmark.

**Benchmark Definition**
The first section of the JSON data defines a general benchmark, which is used as a template for individual test cases. It specifies:

1. **Name**: A human-readable name for the benchmark.
2. **Description**: A brief description of what the benchmark is testing (in this case, parsing an integer or number).
3. **Script Preparation Code** and **Html Preparation Code**: These fields are typically used to specify any setup code that needs to be executed before running the test cases. In this case, both fields are empty, which means no special setup code is required.

**Individual Test Cases**
The next section defines two individual test cases:

1. **Test Case 1: "Number"**: This test case runs the JavaScript code `Array.from('123').map(Number)`, which converts a string to an array and then maps each element to its numeric value using the `Number` function.
2. **Test Case 2: "ParseInt"**: This test case runs the same JavaScript code, but with a slight twist: it uses the `parseInt(string)` method instead of `Number`. This is a legacy way of parsing integers in older browsers.

**What are we testing?**
In this benchmark, we're testing two different approaches to converting strings to numbers:

1. **Using the `Number` function**: This approach uses the `Number` function to convert each character in the string to its numeric value.
2. **Using `parseInt(string)`**: This approach uses the `parseInt()` method, which is a legacy way of parsing integers. It's similar to using `Number`, but it has some additional features and options (more on that later).

**Pros and Cons**

* Using the `Number` function:
	+ Pros: Simple and straightforward, works well in modern browsers.
	+ Cons: May not work as expected if the string contains non-numeric characters or is too long.
* Using `parseInt(string)`:
	+ Pros: More robust and flexible than using `Number`, can handle a wider range of input strings.
	+ Cons: Legacy syntax, may be slower or less efficient than using modern methods.

**Library/Function Explanation**
In this benchmark, the `Array.from()` method is used to create an array from a string, which is then mapped over to convert each character to its numeric value. The `parseInt(string)` function is used in the second test case as an alternative to using the `Number` function.

**Special JS Feature/Syntax**
There are no special JavaScript features or syntax being tested in this benchmark. However, it's worth noting that `Array.from()` and `map()` are modern JavaScript methods that were introduced in ECMAScript 2015 (ES6).

**Other Alternatives**

If you wanted to write a similar benchmark using a different approach, here are some alternatives:

* Test the performance of the `Number` function by comparing its execution time with the execution time of the same code using `parseInt(string)`.
* Add additional test cases that use other methods for converting strings to numbers, such as `parseFloat()` or regular expressions.
* Compare the performance of the benchmark on different browsers or devices.

I hope this explanation helps you understand what's being tested in this JavaScript microbenchmark!

Related benchmarks:

parse to int or Number (version: 0)

parse int or number

Comparing performance of: Number vs ParseInt

Created: 6 years ago by: Guest

Jump to the latest result

Number

ParseInt

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):