Benchmark: RegEx vs For Loop e index

HTML Preparation code:

var string = "passw)odas4gsdfsdf";

Script Preparation code:

var string = "passw)odas4gsdfsdf";

Tests:

RegEx
let isPasswordValid = /(?=.*[0-9])/.test(string);
For Loop
let isPasswordValid = false; for (let i = string.length; i--;) { if ( string[i] === '0' && string[i] === '1' && string[i] === '2' && string[i] === '3' && string[i] === '4' && string[i] === '5' && string[i] === '6' && string[i] === '7' && string[i] === '8' && string[i] === '9' && string[i] === '0' ) { isPasswordValid = true; break; } }
includes
let isPasswordValid = string.includes('4');
indexof
let isPasswordValid = string.indexOf('4') > -1;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
RegEx
For Loop
includes
indexof

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 and explain what's being tested.

**Benchmark Purpose:**
The benchmark measures the performance of three different approaches to check if a string contains the digit '4':

1. **Regular Expressions (RegEx)**: Using a pattern with `RegExp.test()`.
2. **For Loop**: Iterating through the string manually using a `for` loop.
3. **String Method**: Using the `includes()` or `indexOf()` method.

**Options Compared:**

* **RegEx vs For Loop**: These two approaches are being compared to check if the input string contains the digit '4'. The RegEx approach uses a pattern with `RegExp.test()`, while the For Loop approach iterates through the string manually using a `for` loop.
	+ Pros:
		- RegEx is more concise and readable for complex patterns.
		- RegEx can handle multiple patterns in a single test.
	+ Cons:
		- Can be slower than manual iteration due to overhead of regular expression compilation and execution.
* **includes vs indexOf**: These two string methods are being compared to check if the input string contains the digit '4'. The `includes()` method returns `true` as soon as it finds a match, while the `indexOf()` method returns the index of the first occurrence or `-1` if not found.

**Library and Syntax:**
* **RegExp**: A built-in JavaScript library for working with regular expressions. It's used to create patterns that can be matched against strings.
	+ Purpose: To provide a way to match patterns in strings using a declarative syntax.
* **includes() and indexOf():** Built-in string methods that search for a substring within another string.
	+ Purpose: To provide a concise way to check if a string contains a specific substring.

**Special JS Feature/Syntax:**
There's no special JavaScript feature or syntax being tested in this benchmark. The focus is on comparing different approaches to achieve the same goal (checking for a digit '4' in a string).

**Other Alternatives:**

* **Manual String Search**: Without using any built-in methods like `includes()` or `indexOf()`, one could write a simple loop to check each character of the string manually.
* **Array Methods**: One could also use array methods like `some()` or `every()` to achieve the same result, although this might be less readable and more complex than the current implementation.

Overall, the benchmark provides a useful comparison of different approaches to achieve a specific goal in JavaScript. It highlights the trade-offs between conciseness, readability, and performance when working with strings.

Related benchmarks:

RegEx vs For Loop e index (version: 1)

-

Comparing performance of: RegEx vs For Loop vs includes vs indexof

Created: 5 years ago by: Registered User

Jump to the latest result

RegEx

For Loop

includes

indexof

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):