Benchmark: Compare Number vs Regex Test

Script Preparation code:

window.case1 = new Proxy({}, {
  get(t, p, r) {
    if (Number.isInteger(Number(p))) {
      return +p
    }
    else {
      return Reflect.get(t, p, r)
    }
  }
});
window.case2 = new Proxy({}, {
  get(t, p, r) {
    if (/^-?[0-9]+$/.test(p)) {
      return +p
    }
    else {
      return Reflect.get(t, p, r)
    }
  }
});
window.gabage1 = 0;
window.gabage2 = 0;

Tests:

Number
for (let i = 0; i < 1e6;i++) { gabage1 =+ case1[i]; } for (let i = 1.1; i < 1e6;i++) { gabage1 =+ case1[i]; } for (let i = 0; i < 1e6;i++) { gabage1 =+ case1['qwertyuiop']; }
Regex
for (let i = 0; i < 1e6;i++) { gabage1 =+ case1[i]; } for (let i = 1.1; i < 1e6;i++) { gabage1 =+ case1[i]; } for (let i = 0; i < 1e6;i++) { gabage1 =+ case1['qwertyuiop']; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Number
Regex

Fastest: N/A

Slowest: N/A

Latest run results:

No previous 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 Explanation**

The provided benchmark compares two approaches to handle integer values in JavaScript: using the `Number.isInteger()` function and regular expressions (`/-?[0-9]+$/`). The test case, "Compare Number vs Regex Test," creates two proxy objects, `case1` and `case2`, which are used as a mock data structure for testing.

**Options Compared**

The benchmark tests the following options:

*   **Number.isInteger()**: This function checks if a value is an integer. It returns true if the number can be represented without decimal points, and false otherwise.
*   **Regular Expressions (`/-?[0-9]+$/`)**: This regular expression pattern matches strings that consist entirely of digits and optionally an optional minus sign at the beginning. The `+` symbol indicates one or more occurrences of the preceding element.

**Pros and Cons**

*   **Number.isInteger()**:
    *   Pros:
        +   More readable and maintainable code, as it explicitly states the intention to check for integer values.
        +   Efficient, as it uses a built-in function that checks the value's representation.
    *   Cons:
        +   May not be suitable for all edge cases, such as NaN (Not a Number) or very large numbers.
*   **Regular Expressions (`/-?[0-9]+$/`)**:
    *   Pros:
        +   Can handle a wide range of input values and provides a more robust way to check for integer-like values.
        +   More flexible than `Number.isInteger()`, as it can also match strings that contain non-digit characters but have only digits and an optional minus sign.
    *   Cons:
        +   Less readable and maintainable code, as the regular expression pattern may be less intuitive than the `Number.isInteger()` function.
        +   May be slower due to the additional processing required for regular expressions.

**Library and Purpose**

In this benchmark, no external libraries are used. The proxy objects (`case1` and `case2`) are created using JavaScript's built-in `Proxy` object, which allows creating a thin layer of indirection on an existing object or value.

**Special JS Feature/Syntax**

The benchmark uses the `Reflect.get()` function to access properties of an object in a proxied context. This is used to ensure that if the property is not found using the `get()` trap, it will be looked up on the original object. However, since JavaScript has built-in support for this functionality through the `Proxy` API and the `Reflect` namespace, there's no actual "special" feature or syntax being leveraged in this benchmark.

**Alternatives**

Other alternatives to compare integers in JavaScript include:

*   Using a library like `parseInt()` or `parseFloat()`, which can handle decimal points. However, these functions may not be as efficient as the built-in `Number.isInteger()` function.
*   Implementing custom integer checking logic using bitwise operations or mathematical manipulations. This approach requires more code and may not be as readable or maintainable.

In summary, the benchmark provides a neutral comparison between two approaches to handle integer values in JavaScript: using the `Number.isInteger()` function and regular expressions (`/-?[0-9]+$/`). The choice of which approach to use depends on the specific requirements of the application and personal preference.

Related benchmarks:

Compare Number vs Regex Test (version: 0)

Comparing performance of: Number vs Regex

Created: 2 years ago by: Guest

Jump to the latest result

Number

Regex

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):