Benchmark: RegEx.test vs. Equals

Script Preparation code:

var string = "Cat";
var regex = /Cat|Lion|Tiger/;

Tests:

RegEx.test
regex.test(string);
Equals
string === ("Cat" || "Lion" || "Tiger")

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
RegEx.test
Equals

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36 Edg/139.0.0.0

Browser/OS: Chrome 139 on Windows

View result in a separate tab

Test name	Executions per second
RegEx.test	55112440.0 Ops/sec
Equals	183926576.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition and test cases to explain what's being tested, the compared options, their pros and cons, and other considerations.

**Benchmark Definition Overview**

The benchmark is comparing two approaches for testing if a string matches a certain pattern:

1. `regex.test(string)`: This approach uses the built-in `test()` method of JavaScript regular expressions.
2. `(string === (\"Cat\" || \"Lion\" || \"Tiger\"))`: This approach uses a simple equality check with a tuple of strings.

**Comparison Overview**

The benchmark is comparing these two approaches to measure which one performs better in terms of execution speed.

**Options Compared:**

1. **Regex.test()**: This method tests if the entire string matches the regular expression.
2. **Simple Equality Check**: This approach checks if the input string is equal to any of the strings in the tuple (`"Cat"`, `"Lion"`, or `"Tiger"`).

**Pros and Cons:**

1. **Regex.test()**:
	* Pros:
		+ More flexible for complex patterns.
		+ Allows for more precise matching (e.g., exact matches, partial matches).
	* Cons:
		+ May be slower due to the complexity of the regex engine.
2. **Simple Equality Check**:
	* Pros:
		+ Faster execution time since it only compares strings using equality operators (`===`).
	* Cons:
		+ Less flexible and less precise than `regex.test()`.

**Library Used:**

None explicitly mentioned, but JavaScript's built-in regular expression engine is used for the `regex.test()` method.

**Special JS Feature/Syntax:**

The benchmark does not use any special JavaScript features or syntax beyond standard language constructs. However, it's worth noting that modern browsers may optimize certain operations under the hood, which might affect the results.

**Other Considerations:**

* The benchmark only tests a single string (`"Cat"`), so the results might not generalize to other strings.
* The test case uses a tuple with three elements, but this is just for simplicity. In a real-world scenario, you would likely want to compare against multiple values or use a more robust matching mechanism.

**Alternatives:**

If you need to perform similar benchmarks in the future, consider these alternatives:

1. Use `String.prototype.includes()` instead of `regex.test()`, which might be faster and still provides some flexibility.
2. Compare against an array of strings using `Array.prototype.some()` or `Array.prototype.every()` methods.
3. Consider using a library like RegExBenchmark to create more complex benchmarks with various regex patterns.

Keep in mind that the specific results may vary depending on the JavaScript engine, browser, and system configuration being used.

Related benchmarks:

RegEx.test vs. Equals (version: 0)

Comparing performance of: RegEx.test vs Equals

Created: 2 years ago by: Guest

Jump to the latest result

RegEx.test

Equals

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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