Benchmark: Is Number Check - MeasureThat.net

Script Preparation code:


function toStrCase(obj){
  return typeof obj === 'number';
}
function consCase(obj){
  return !Number.isNaN(obj)
}

Tests:

Test
toStrCase(1)
Test 2
consCase(1)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Test
Test 2

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 17 on iOS 17.2.1

View result in a separate tab

Test name	Executions per second
Test	26822208.0 Ops/sec
Test 2	11509604.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll explain the benchmark in detail.

**Benchmark Definition**

The provided JSON defines a JavaScript microbenchmark called "Is Number Check". This benchmark measures the performance of two functions: `toStrCase` and `consCase`. Both functions are designed to check if a given input is a number.

*   `toStrCase`: This function returns `true` if the input is a number, and `false` otherwise. The implementation uses a simple string conversion approach.
*   `consCase`: This function returns `true` if the input is not NaN (Not a Number), and `false` otherwise. The implementation uses the built-in `Number.isNaN()` method.

**Comparison of Options**

The benchmark compares two approaches to check if a number:

1.  **`toStrCase`**: Converts the input string to lowercase and checks if it's empty using `typeof obj === 'number'`. This approach can be slow because it involves additional string operations.
2.  **`consCase`**: Uses the built-in `Number.isNaN()` method, which is a more efficient way to check for NaN values.

**Pros and Cons**

*   **`toStrCase`**:
    *   Pros: Easy to understand and implement, no dependencies on special JavaScript features.
    *   Cons: Slow due to additional string operations.
*   **`consCase`**:
    *   Pros: Faster, uses a built-in method, and doesn't involve additional string operations.
    *   Cons: Requires knowledge of the `Number.isNaN()` function.

The benchmark results will likely show that `consCase` is faster than `toStrCase`, as it leverages the optimized implementation of `Number.isNaN()`.

**Library Usage**

There are no libraries used in this benchmark, but I'll mention a few notable ones:

*   `Number.isNaN()`: A built-in method for checking if a value is NaN (Not a Number).
*   No special JavaScript features are used in this benchmark.

Related benchmarks:

Is Number Check (version: 0)

Comparing performance of: Test vs Test 2

Created: 4 years ago by: Guest

Jump to the latest result

Test

Test 2

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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