Benchmark: parseInt benchmark v2

Script Preparation code:

var strB = "123";

Tests:

No conversion
var res = strB; console.log(res);
parseInt
var res = parseInt(strB); console.log(res);
Number
var res = Number(strB); console.log(res);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
No conversion
parseInt
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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I'll break down the provided JSON data and explain what's being tested, compared, and other considerations.

**Benchmark Definition**

The benchmark definition represents a JavaScript microbenchmark that tests three different approaches to convert a string to an integer: `parseInt`, `Number`, and no conversion (i.e., using the value directly). The script preparation code initializes a variable `strB` with the string "123".

**Test Cases**

There are three test cases, each representing one of the three approaches:

1. **No Conversion**: This test case does not perform any explicit conversion on the string. Instead, it logs the original string value to the console.
2. **parseInt**: This test case uses the `parseInt` function to convert the string "123" to an integer.
3. **Number**: This test case uses the `Number` function to convert the string "123" to a number.

**Library and Purpose**

In this benchmark, the following libraries/libraries-like-approaches are used:

* `parseInt`: A built-in JavaScript function that attempts to parse a string as an integer.
* `Number`: A built-in JavaScript function that attempts to parse a string as a number. Note that `Number` is not exactly equivalent to `parseInt`, as it returns NaN (Not a Number) if the input cannot be parsed.

**Special JS Feature/Syntax**

There are no special features or syntax used in this benchmark.

**Pros and Cons of Different Approaches**

Here's a brief summary of each approach:

1. **No Conversion**: This approach can be faster because it doesn't involve any function calls or conversions. However, it may lead to incorrect results if the input string is not already an integer.
2. **parseInt**: This approach is widely supported and can handle various input formats (e.g., "123abc"). However, it may return NaN for non-numeric input strings.
3. **Number**: This approach is similar to `parseInt`, but returns NaN instead of ignoring non-numeric characters. It's also less efficient than `parseInt`.

**Other Considerations**

When writing benchmarks like this one, consider the following:

* Use a consistent and representative dataset.
* Avoid benchmarking complex algorithms or computations that may not be relevant to the specific question being asked.
* Include multiple test cases to cover different scenarios and approaches.
* Optimize your code for performance, but also ensure it's readable and maintainable.

**Alternatives**

If you need to benchmark other approaches to convert a string to an integer, consider using:

* `toString()` + `slice()`: Convert the string to a numeric value by removing non-numeric characters and then converting the remaining string to an integer.
* Regular expressions: Use a regular expression to extract numeric characters from the input string and then convert them to an integer.

Keep in mind that these alternatives may have different performance characteristics or limitations compared to `parseInt` or `Number`.

Related benchmarks:

parseInt benchmark v2 (version: 0)

Comparing performance of: No conversion vs parseInt vs Number

Created: 3 years ago by: Guest

Jump to the latest result

No conversion

parseInt

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):