Benchmark: isInteger Check - MeasureThat.net

Script Preparation code:

var a = 0;

Tests:

isInteger
Number.isInteger(a);
operator
a !== undefined || a !== null

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
isInteger
operator

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:148.0) Gecko/20100101 Firefox/148.0

Browser/OS: Firefox 148 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
isInteger	1624997504.0 Ops/sec
operator	1655841152.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its components.

**Benchmark Definition JSON**

The provided `Benchmark Definition` JSON contains information about the benchmark itself, including:

*   **Name**: A unique identifier for the benchmark ("isInteger Check").
*   **Description**: An empty string indicating that no description is available for this benchmark.
*   **Script Preparation Code**: A JavaScript snippet (`var a = 0;`) executed before running the benchmark. This code initializes a variable `a` to zero, ensuring it's defined and has a value when used in the tests.
*   **Html Preparation Code**: An empty string, indicating that no HTML-related code needs to be executed before running the benchmark.

**Individual Test Cases**

The test cases themselves are specified using an array of objects. Each object represents a single test case:

*   **Benchmark Definition**: A JavaScript expression defining the test case's purpose (`Number.isInteger(a);` and `a !== undefined || a !== null`). These expressions check whether the variable `a` is an integer.
*   **Test Name**: A human-readable name for each test case ("isInteger" and "operator").

**Benchmark Results**

The latest benchmark results are provided as a JSON array containing two objects:

*   Each object represents the performance data collected during the benchmarking process.
    *   **RawUAString**: A string representing the User Agent (UA) of the browser used for testing (`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36`).
    *   **Browser**: The version and type of the browser used (`Chrome 114`).
    *   **DevicePlatform**: The device platform being tested (`Desktop`).
    *   **OperatingSystem**: The operating system being tested (`Mac OS X 10.15.7`).
    *   **ExecutionsPerSecond**: A numerical value indicating the number of executions per second for each test case.
    *   **TestName**: The name of the test case being reported.

**Analysis**

The provided benchmark compares two JavaScript expressions:

1.  `Number.isInteger(a);`: This expression checks whether a given variable (`a`) is an integer using the built-in `Number.isInteger()` method.
2.  `a !== undefined || a !== null`: This expression checks whether a variable (`a`), or its absence, does not equal either `undefined` or `null`. It uses logical OR and negation to achieve this.

**Pros and Cons of Each Approach:**

1.  **Number.isInteger(a);**: Using the built-in method provides an efficient and standard way to check if a variable is an integer. The method itself has some pros (it's widely supported and easy to read), but it may also have some cons in certain scenarios, such as when dealing with complex numbers or non-numeric values.
2.  `a !== undefined || a !== null`: This expression provides more control over the checking process, allowing for potential edge cases to be handled. However, it's generally less readable and might lead to additional errors due to its complexity.

**Other Considerations:**

*   **Library Usage**: The provided benchmark doesn't explicitly use any external libraries.
*   **Special JS Features or Syntax**: There are no special JavaScript features or syntax mentioned in the context of this benchmark.

Related benchmarks:

isInteger Check (version: 0)

Comparing performance of: isInteger vs operator

Created: 2 years ago by: Guest

Jump to the latest result

isInteger

operator

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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