What is being tested?

MeasureThat.net is testing the performance of three different ways to convert a number to a string in JavaScript: using the String() function, calling the toString() method on the number itself (num.toString()), and concatenating an empty string (+ '').

Options compared

The three options are being compared in terms of their execution time. The benchmark is measuring how many executions per second each option can handle.

Pros and Cons of each approach:

1. String() function: This method creates a new string object using the String() function, which involves creating an intermediate object before converting it to a string.
   • Pros: Can be useful when you need to perform additional operations on the resulting string (e.g., formatting).
   • Cons: Creates an intermediate object, which can increase memory usage and potentially slow down performance.
2. toString() method: This method calls the toString() method directly on the number itself, which is a built-in method that converts numbers to strings.
   • Pros: Fast and efficient, as it avoids creating an intermediate object.
   • Cons: May not work correctly with non-numeric values (e.g., NaN).
3. Concatenating an empty string (+ ''): This method uses the + operator to concatenate an empty string with the number, effectively converting the number to a string.
   • Pros: Simple and easy to understand, but may be slower than other methods due to the overhead of concatenation.
   • Cons: May not work correctly with non-numeric values (e.g., NaN).

Library usage

None of the provided benchmark cases uses any external libraries.

Special JavaScript features or syntax

The benchmark cases use a simple for loop and array push method (nums.push(...)) to test each option. No special JavaScript features or syntax are used.

Other alternatives

There may be other ways to convert numbers to strings in JavaScript, such as using template literals (e.g., num.toString() with template literals) or the Number.prototype.toString() method. However, these alternatives are not being tested in this benchmark.

In general, when converting numbers to strings, it's essential to consider performance and potential edge cases (e.g., non-numeric values). The choice of method ultimately depends on the specific requirements and constraints of your application.