Benchmark: IP Split vs Regex

Script Preparation code:

var value = "192.25.23.1"

Tests:

regex
// Check if value is an IP address if (/^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/.test(value)) { return true; }
split
var parts = value.split("."); if (parts.length !== 4) { return false; } for (var i = 0; i < parts.length; i++) { var part = parseInt(parts[i]); if (isNaN(part) || part < 0 || part > 255) { return false; } } return true;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
regex
split

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 the benchmark test and explain what's being tested.

**Benchmark Overview**

The benchmark tests two approaches to validate if a given string represents an IP address:

1. **Regular Expression (Regex)**
2. **String Splitting**

We'll discuss each approach, its pros and cons, and other considerations.

**Approach 1: Regular Expression (Regex)**

The `Benchmark Definition` JSON contains a regular expression that checks if the input string `value` matches the IP address pattern:
```javascript
if (/^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/.test(value)) {
    return true;
}
```
This regular expression breaks down as follows:

* `^` matches the start of the string
* `(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)` matches a single octet (a value between 0 and 255)
* `\.` matches a literal period character
* The pattern is repeated three times to match the four octets of an IP address
* `$` matches the end of the string

Pros:

* Simple and concise syntax
* Can be easily extended to validate other IP address formats

Cons:

* Performance may be slower due to the complexity of the regular expression engine

**Approach 2: String Splitting**

The second approach splits the input string `value` into individual octets using the `.` character as a delimiter:
```javascript
var parts = value.split(".");

if (parts.length !== 4) {
    return false;
}

for (var i = 0; i < parts.length; i++) {
    var part = parseInt(parts[i]);

if (isNaN(part) || part < 0 || part > 255) {
        return false;
    }
}
```
This approach is more straightforward than the regular expression approach.

Pros:

* May be faster due to the simplicity of the string splitting operation
* Easier to understand and maintain

Cons:

* Requires manual handling of edge cases (e.g., handling strings with fewer or more octets)

**Library Used**

In both approaches, no external libraries are required. The regular expression pattern is a built-in JavaScript feature, while the `split()` method is another native JavaScript function.

**Special JS Feature/ Syntax**

No special JavaScript features or syntax are used in this benchmark test.

**Other Alternatives**

Other alternatives to validate IP addresses include:

1. **IP address validation libraries**: There are several third-party libraries available that provide more advanced IP address validation functionality, such as `ip-address` (Node.js) or `ipaddr` (Python).
2. **Custom implementation using bitwise operations**: An alternative approach is to use bitwise operations to validate the IP address format.

However, for a simple benchmark like this one, the built-in JavaScript functions and regular expression pattern are sufficient.

Related benchmarks:

IP Split vs Regex (version: 0)

Comparing performance of: regex vs split

Created: 3 years ago by: Registered User

Jump to the latest result

regex

split

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):