Benchmark: number vs Number(number) 3

Tests:

a32
let a = []; const n1 = 1; const s1 = '1'; for (let i = 0; i < 100000; i++) { a.push(n1); a.push(s1); } for (const c of a) { const d = typeof c === 'number' ? c : Number(c); }
34234
let a2 = []; const n12 = 1; const s12 = '1'; for (let i = 0; i < 100000; i++) { a2.push(n12); a2.push(s12); } for (const c of a2) { const d = Number(c); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
a32
34234

Fastest: N/A

Slowest: N/A

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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 explain what's being tested, compared, and the pros and cons of each approach.

**Benchmark Overview**

The test measures the performance difference between using `typeof` with a conditional statement to check if a value is a number (`number`) versus directly converting a non-numeric string to a number using the `Number()` function. The benchmark creates two arrays, pushes numbers and strings into them, and then iterates through the arrays to apply the above approaches.

**Approaches Compared**

1. **Using `typeof` with conditional statement**: `const d = typeof c === 'number' ? c : Number(c);`
	* Pros:
		+ More readable code, as it clearly conveys the intention of checking if a value is a number.
		+ Can handle non-numeric strings by converting them to numbers.
	* Cons:
		+ May have slower performance due to the type check and conditional statement.
2. **Using `Number()` function**: `const d = Number(c);`
	* Pros:
		+ Faster, as it directly converts a value to a number without an additional type check.
	* Cons:
		+ Less readable code, as it doesn't explicitly convey the intention of checking if a value is a number.

**Library Used**

In both test cases, there are no libraries used. However, `Array.prototype.forEach()` and `String.prototype.toString()` might be optimized with built-in browser functions or implementations, which could affect performance.

**JavaScript Features/Syntax**

None mentioned in this specific benchmark. The code only uses basic JavaScript features like for loops, arrays, and string concatenation.

**Performance Considerations**

The benchmark is likely comparing the performance of these approaches to determine which one is faster. In general:

* Direct conversions (e.g., `Number(c)`) can be faster but may also lead to lost precision or NaN values if the input value cannot be converted.
* Type checks and conditional statements can provide more robustness and accuracy but might incur a performance overhead.

**Other Alternatives**

If you need to compare other approaches, here are some alternatives:

1. Using `parseInt()` instead of `Number()`: This would convert strings to integers rather than numbers.
2. Using a library like Lodash's `isNumber()` function: This would provide a more robust way to check if a value is a number, potentially with better performance than using `typeof` and a conditional statement.
3. Using arrow functions or regular expressions to simplify the code: These could make the code more concise but might not affect performance directly.

Keep in mind that these alternatives depend on specific use cases and performance requirements.

Related benchmarks:

number vs Number(number) 3 (version: 0)

Comparing performance of: a32 vs 34234

Created: 5 years ago by: Guest

Jump to the latest result

a32

34234

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):