Benchmark: RegExp.exec 1k vs 10k vs 100k character string

Script Preparation code:

var regex = /Goodbye (World)/;
var smallStr = '';
var medStr = '';
var largeStr = '';

for (var i = 0; i < 5000; i++) {
  if (i % 100 === 0) smallStr += 'Small World! ' + Math.floor(Math.random() * 8);
  if (i % 10 === 0) medStr += 'Medium World! ' + Math.floor(Math.random() * 6);
  largeStr += 'Large World! ' + Math.floor(Math.random() * 7);
}

Tests:

1k length string
regex.exec(smallStr);
10k length string
regex.exec(medStr);
100k length string
regex.exec(largeStr);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1k length string
10k length string
100k length string

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

**Benchmark Overview**

The provided benchmark measures the execution time of `RegExp.exec()` for strings of varying lengths (1k, 10k, and 100k characters). The benchmark creates three different strings: `smallStr`, `medStr`, and `largeStr`, which are populated with random text to simulate a real-world scenario.

**Options Compared**

The benchmark compares the execution time of `RegExp.exec()` for each string length:

1. **Small string (1k characters)**
2. **Medium string (10k characters)**
3. **Large string (100k characters)**

**Pros and Cons of Different Approaches:**

* Using a large number of random strings to create the test data can help ensure that the results are representative of real-world usage patterns.
	+ Pros: More realistic testing, better handling of edge cases.
	+ Cons: Increased computational time, potential for slower benchmark results.
* Using a fixed-length string with random text can provide a more controlled environment for testing.
	+ Pros: Faster benchmark results, easier to analyze and compare results.
	+ Cons: May not accurately represent real-world usage patterns.

**Library Used**

In this benchmark, the `RegExp` object is used. The `RegExp` object is a built-in JavaScript library that provides regular expression matching functions, including `exec()`.

**Special JS Feature or Syntax**

The benchmark uses the `Math.floor(Math.random() * 8)` syntax to generate random numbers within a specific range for the small string. This syntax is not particularly noteworthy, as it's a common way to generate random integers in JavaScript.

**Other Considerations:**

* The benchmark does not account for any potential errors or exceptions that may occur during execution.
* There are no input validation checks for the `RegExp` object or its methods.
* The benchmark assumes that the `RegExp` object is initialized with a compiled regular expression using the `/Goodbye (World)/` pattern.

**Alternatives:**

If you were to recreate this benchmark, consider the following alternatives:

1. **Use a more realistic random string generation method**, such as generating strings from a character set or using a random text generator library.
2. **Add input validation checks** for the `RegExp` object and its methods to ensure robustness and reliability.
3. **Consider adding error handling** to account for potential exceptions during execution.
4. **Use a more efficient string creation method**, such as using an array of characters or a string builder, to reduce computational overhead.

Keep in mind that these alternatives may affect the accuracy or efficiency of the benchmark results.

Related benchmarks:

RegExp.exec 1k vs 10k vs 100k character string (version: 0)

Testing exec (not found) times for different string lengths

Comparing performance of: 1k length string vs 10k length string vs 100k length string

Created: 3 years ago by: Guest

Jump to the latest result

1k length string

10k length string

100k length string

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):