Benchmark: Three Digit Validator 2

HTML Preparation code:

var string = "abe123";

Script Preparation code:

var string = "abe123";

Tests:

Regex
let isLastNameValid = false; const THREE_DIGIT_REGEXP = /\d{3,}/; isLastNameValid = THREE_DIGIT_REGEXP.test(string);
Loop
let isLastNameValid = false; let digits = 0; for(let i = 0; i < string.length; i++) { !isNaN(string.charAt(i)) && digits++; } isLastNameValid = digits >= 3;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Regex
Loop

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 MeasureThat.net and explore what's being tested in this benchmark.

**Benchmark Definition**

The benchmark is designed to test two approaches for validating three-digit strings: using regular expressions (Regex) and looping through each character.

**Script Preparation Code**

Both test cases start with the same preparation code:
```javascript
var string = "abe123";
```
This sets a predefined input string `string` that will be used as the test subject for both approaches.

**Benchmark Definition Details**

Now, let's analyze the two benchmark definitions:

1. **Regex Benchmark**
The first test case uses regular expressions to validate if the last three characters of the `string` are digits:
```javascript
let isLastNameValid = false;
const THREE_DIGIT_REGEXP = /\\d{3,}/;
isLastNameValid = THREE_DIGIT_REGEXP.test(string);
```
This approach relies on a predefined regular expression pattern (`\\d{3,}`) to match three or more consecutive digits at the end of the string.

**Pros and Cons**

Advantages:

* Concise and expressive code
* Easy to read and maintain

Disadvantages:

* May not work as expected for edge cases (e.g., non-numeric characters before the digit sequence)
* Performance may vary depending on the regex engine used by the browser

2. **Loop Benchmark**
The second test case uses a manual loop to iterate through each character of the `string` and count the digits:
```javascript
let isLastNameValid = false;
let digits = 0;
for (let i = 0; i < string.length; i++) {
  !isNaN(string.charAt(i)) && digits++;
}
isLastNameValid = digits >= 3;
```
This approach involves a simple loop that checks each character of the `string` using the `isNaN()` function to detect numeric characters.

**Pros and Cons**

Advantages:

* Works for edge cases (e.g., non-numeric characters before the digit sequence)
* Easy to understand and implement

Disadvantages:

* More code than the Regex approach
* Performance may be slower due to the loop overhead

**Library: THREE_DIGIT_REGEXP**

The `THREE_DIGIT_REGEXP` variable is a predefined regular expression pattern that is used in the Regex benchmark. This pattern is likely defined by MeasureThat.net to provide a consistent and efficient way to match three or more consecutive digits at the end of a string.

**Special JavaScript Feature/Syntax: None**

There are no special JavaScript features or syntax used in these benchmark definitions.

**Other Alternatives**

If you were to rewrite this benchmark, you could consider alternative approaches, such as:

* Using a more complex regular expression pattern to match three-digit strings with optional leading characters (e.g., `\\d{3}(?:[0-9]*[0-9])?`)
* Using a different algorithm, such as a greedy approach that tries to find the first sequence of digits and then checks if it's at least three characters long.

Keep in mind that these alternatives might affect performance or accuracy, so it's essential to test and validate them thoroughly.

Related benchmarks:

Three Digit Validator 2 (version: 0)

Comparing performance of: Regex vs Loop

Created: 4 years ago by: Guest

Jump to the latest result

Regex

Loop

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):