Benchmark: Is negative fork

Tests:

Includes
"-5".includes("-")
Lt
"-5" < 0
Index of
"-5".indexOf("-") > -1

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Includes
Lt
Index of

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.1 Safari/605.1.15

Browser/OS: Safari 13 on Mac OS X 10.15.5

View result in a separate tab

Test name	Executions per second
Includes	37866924.0 Ops/sec
Lt	25740606.0 Ops/sec
Index of	43423712.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark information and explain what's being tested.

**Benchmark Definition**

The benchmark definition is a JSON object that contains three properties:

* `Name`: The name of the benchmark, which is "Is negative fork".
* `Description`: An empty string, indicating that there's no description for this benchmark.
* `Script Preparation Code` and `Html Preparation Code`: Both are null, meaning that no code needs to be prepared or executed before running the benchmark.

**Individual Test Cases**

The benchmark consists of three test cases, each represented by an object in the following format:

* `Benchmark Definition`: A string representing a JavaScript expression. This is where the actual benchmarking happens.
* `Test Name`: A descriptive name for each test case, such as "Includes", "Lt", and "Index of".

Let's analyze each test case:

1. **"Includes"`: The benchmark definition `"\"-5\".includes(\"-\")"` tests whether the string "-5" includes the character "-" using the `includes()` method.
2. **"Lt"`: The benchmark definition `"\"-5\" < 0"` tests whether the value of the expression `"\"-5\""` is less than 0. This test case uses a numerical comparison, which might be evaluated differently by various JavaScript engines or browsers.
3. **"Index of"`: The benchmark definition `"\"-5\".indexOf(\"-\") > -1"` tests whether the index of the character "-" in the string "-5" is greater than -1.

**Options Compared**

The three test cases compare different aspects of JavaScript:

* `includes()`: Tests the behavior of the `includes()` method, which returns a boolean value indicating whether a specified value exists within a string.
* Numerical comparison (`<`): Tests how JavaScript evaluates numerical expressions, including integer overflow or underflow scenarios.
* String indexing (`indexOf()`) : Tests the behavior of the `indexOf()` method, which returns the index of the first occurrence of a specified character in a string.

**Pros and Cons**

Here's a brief analysis of each test case:

1. **`includes()`**: This test is useful for understanding how JavaScript handles string matching, including edge cases like empty strings or null values.
	* Pros: Easy to understand and interpret results.
	* Cons: May not cover all possible use cases (e.g., performance optimizations).
2. **Numerical comparison (`<`)**: This test highlights potential issues with integer overflow or underflow in JavaScript engines.
	* Pros: Essential for ensuring accurate numerical calculations.
	* Cons: Can be sensitive to specific implementation details (e.g., engine-specific rounding modes).
3. **`indexOf()`**: This test evaluates how JavaScript handles string indexing, which can impact performance and security in certain scenarios.
	* Pros: Useful for identifying issues with string manipulation or indexing algorithms.
	* Cons: May require additional testing to account for edge cases like Unicode characters.

**Other Considerations**

When running benchmarks, it's essential to consider factors such as:

* **Browser support**: Test cases should cover a range of browsers and versions to ensure compatibility.
* **Engine-specific optimizations**: JavaScript engines may optimize certain features or operations differently. Ensure that test cases capture these variations.
* **Security considerations**: Some tests might expose security vulnerabilities if executed in the wrong context.

**Alternatives**

If you're interested in running similar benchmarks, consider exploring other options:

1. **Benchmarking frameworks**: Use established frameworks like Benchmark.js or JSPerf to create and run your own benchmarks.
2. **JavaScript engines comparison**: Test different JavaScript engines (e.g., V8, SpiderMonkey) to compare their performance, features, and behavior.
3. **String manipulation libraries**: Evaluate popular string manipulation libraries like Lodash or Underscore.js for their performance and accuracy.

Keep in mind that MeasureThat.net provides a unique value proposition by offering a simple, web-based platform for creating and running JavaScript microbenchmarks.

Related benchmarks:

Is negative fork (version: 0)

Comparing performance of: Includes vs Lt vs Index of

Created: 4 years ago by: Guest

Jump to the latest result

Includes

Lt

Index of

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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