Benchmark: Number constructor vs double tilde

Tests:

Number
var numberbool = Number(Math.random()<0.5);
double NOT bitwise
var bitshiftbool = ~~(Math.random()<0.5);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Number
double NOT bitwise

Fastest: N/A

Slowest: N/A

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

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Let's break down the provided JSON benchmark definitions and explain what's being tested, compared, and the pros/cons of each approach.

**What is tested:**

The benchmark measures the performance difference between two approaches to create or initialize a number:

1. **Number()**: The `Number()` function creates a new number object.
2. **Double tilde (~) (double NOT)**: The double tilde operator `~~` performs bitwise negation on its operand, which can also result in a number.

**Options compared:**

The benchmark compares the performance of these two approaches:

* **Number()**: Creates a new number object using the `Number()` function.
* **Double tilde (~) (double NOT)**: Performs bitwise negation on its operand to create a negative number.

**Pros and Cons:**

1. **Number():**
	* Pros:
		+ Explicitly creates a number object, which can be beneficial for explicitness and readability.
		+ May provide better error handling due to the `Number()` function checking for invalid input.
	* Cons:
		+ Creates an additional object, potentially consuming more memory and resources.
		+ Might be slower due to the overhead of creating a new object.
2. **Double tilde (~) (double NOT):**
	* Pros:
		+ Can be faster since it only performs bitwise negation, which is typically very quick.
		+ Uses existing number types and operators, reducing memory allocation and potential overhead.
	* Cons:
		+ May have unexpected behavior for certain inputs or edge cases (e.g., non-numeric values).
		+ May not provide explicitness or readability when used in complex expressions.

**Library usage:**

There is no library explicitly mentioned in the benchmark definitions. However, it's essential to note that both `Number()` and the double tilde operator use existing JavaScript built-in functions and operators.

**Special JS feature or syntax:**

The benchmark uses a special JavaScript feature:

* **Bitwise NOT (~)**: The bitwise NOT operator performs a binary complement operation on its operand, which is equivalent to negating the number. This is a low-level operation that can be faster but may also have unexpected behavior for certain inputs.

**Other alternatives:**

If you need alternative approaches for creating or initializing numbers, consider:

1. **parseInt()**: Creates an integer value from a string representation.
2. **parseFloat():** Parses a floating-point number from a string representation.
3. **NaN (Not a Number)**: Returns `NaN` if the input is not a valid number.

Keep in mind that these alternatives might have different performance characteristics and may require additional checks for invalid inputs or edge cases.

Related benchmarks:

Number constructor vs double tilde (version: 0)

Number() vs ~~

Comparing performance of: Number vs double NOT bitwise

Created: 4 years ago by: Guest

Jump to the latest result

Number

double NOT bitwise

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):