Benchmark: regex vs terms.some(term => string.includes(term)) - 5 terms

Script Preparation code:

var reg = /cc-animate|loading|pt-price|price h4-style on-sale/;

var lazyLoadingThemes = ["cc-animate", "loading", "pt-price", "price h4-style on-sale"];
var yourclass= "price"

Tests:

some
lazyLoadingThemes.some(selector => yourclass.includes(selector))
regex
reg.test(yourclass)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
some
regex

Fastest: N/A

Slowest: N/A

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

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I'd be happy to explain the benchmark and its results.

**Benchmark Definition**

The provided JSON represents a JavaScript microbenchmark that compares two approaches: using regular expressions (regex) and using the `includes()` method with an array of terms.

**Script Preparation Code**

The script preparation code defines:

* A regex pattern (`reg`) that matches specific strings: `/cc-animate|loading|pt-price|price h4-style on-sale/`
* An array of theme names (`lazyLoadingThemes`) that contains the same values as in the regex pattern
* The variable `yourclass` is set to `"price"`

**Html Preparation Code**

The HTML preparation code is empty, which means no HTML code is provided for the benchmark.

**Individual Test Cases**

There are two test cases:

1. **"some"`**: This test case uses the `lazyLoadingThemes.some()` method to find whether the string `"price"` includes any of the themes in the `lazyLoadingThemes` array.
2. **"regex"`**: This test case uses a regex pattern (`reg.test()`) to check if the string `"price"` matches any of the themes in the `lazyLoadingThemes` array.

**Approaches Compared**

The two approaches compared are:

1. Using the `includes()` method with an array of terms: `lazyLoadingThemes.some(selector => yourclass.includes(selector))`
2. Using a regex pattern: `reg.test(yourclass)`

**Pros and Cons**

**Using `includes()` method with an array of terms:**

Pros:

* More readable and maintainable, as it clearly expresses the intent of checking if a string includes any of the themes in the array.
* Less error-prone, as it avoids common regex pitfalls like character class syntax.

Cons:

* May be slower for large arrays or complex strings.
* Requires the array to contain only exact matches (i.e., no fuzzy matching).

**Using a regex pattern:**

Pros:

* Can handle more complex patterns and fuzzy matching.
* May be faster for small to medium-sized inputs.

Cons:

* Less readable and maintainable, as it requires knowledge of regex syntax.
* More error-prone, due to the complexity of regex patterns.

**Library Used**

The `includes()` method is a built-in JavaScript method that is part of the standard library. It's used by modern browsers and Node.js to check if a string includes any of its elements in an array.

**Special JS Feature or Syntax**

None are mentioned, but it's worth noting that this benchmark focuses on comparing two common approaches to string matching in JavaScript, which are both built-in methods or syntax.

**Other Alternatives**

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

1. Using the `String.prototype.includes()` method with a custom callback function.
2. Implementing your own custom regex engine (e.g., using a library like `regex-optimize`).
3. Using other string matching libraries or modules, such as `string-match` or `fn-matches`.

Keep in mind that each of these alternatives may have their own trade-offs and pros/cons, which would need to be evaluated based on the specific use case and requirements.

I hope this explanation helps!

Related benchmarks:

regex vs terms.some(term => string.includes(term)) - 5 terms (version: 0)

Comparing performance of: some vs regex

Created: 3 years ago by: Guest

Jump to the latest result

some

regex

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):