Benchmark: parseInt vs replace

HTML Preparation code:

<div>test</div>

Script Preparation code:

var radius = "8px";
var border = "2px";

Tests:

parseInt
var r = parseInt(radius, 10); var b = parseInt(border, 10); var res = r - b;
replace
var pattern = /[^0-9]/; var r = radius.replace(pattern, ''); var b = border.replace(pattern, ''); var res = Number(r) - Number(b);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
parseInt
replace

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what is being tested.

The test case compares two approaches to parse or manipulate strings: `parseInt` and string replacement using regular expressions (`replace`). Both methods are used to extract numeric values from input strings.

**1. parseInt**

`parseInt` is a built-in JavaScript function that attempts to convert a string into an integer number. It takes two arguments: the string to be converted, and an optional radix (base) parameter. In this test case, `parseInt` is used with the radix 10, which means it expects the input string to represent a decimal number.

**Pros:**

* Simple to use and understand.
* Fast, as it's a built-in function optimized for performance.
* Can handle common numeric formats like "123" or "-456".

**Cons:**

* May fail if the input string contains non-numeric characters or is not in the expected format.
* Can be vulnerable to errors if the radix is incorrect.

**2. String Replacement using Regular Expressions (replace)**

The `replace` method uses regular expressions to search for patterns in a string and replace them with another value. In this test case, it's used to remove non-numeric characters from the input strings.

**Pros:**

* More flexible than `parseInt`, as it can handle complex numeric formats or remove non-numeric characters.
* Can be used to perform more advanced text processing tasks.

**Cons:**

* Slower than `parseInt` due to the overhead of regular expression parsing and matching.
* Requires a good understanding of regular expressions, which can be intimidating for beginners.

In this test case, both methods are used to calculate the difference between two numeric values extracted from input strings. The first method uses `parseInt`, while the second method uses string replacement with regular expressions.

**Library/Function Used**

None specific is mentioned in the provided JSON but it's implied that there are libraries and functions involved as the benchmark requires different implementations of the test cases.

**Special JS Feature/Syntax**

There are no special JavaScript features or syntax used in this benchmark. It only relies on standard JavaScript built-in functions and operators.

**Other Alternatives**

If you're interested in exploring alternative methods, here are a few:

* `parseFloat` for floating-point numbers
* `isNaN()` and `isFinite()` to check if a value is not a number or not finite
* `regex.split()` or `regex.exec()` for more advanced string manipulation

Keep in mind that each approach has its trade-offs, and the best choice depends on the specific requirements of your use case.

The benchmark result provided shows that Chrome 98 performs slightly better than replace with `parseInt`. However, it's essential to note that this result might vary depending on factors like browser updates, system configuration, and test environment.

Related benchmarks:

parseInt vs replace (version: 0)

test

Comparing performance of: parseInt vs replace

Created: 4 years ago by: Registered User

Jump to the latest result

parseInt

replace

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):