Benchmark: Most Significant Digit

Script Preparation code:

var randomNumbers = [0, 1, 632]

Tests:

String Interpolation
for(var n of randomNumbers){ console.log((""+n)[0]) }
Log based
for(var n of randomNumbers){ console.log(n / (10 ** Math.floor(Math.log10(n)))); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String Interpolation
Log based

Fastest: N/A

Slowest: N/A

Latest run results:

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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 definition and test cases.

**Benchmark Definition:**
The benchmark is designed to compare the performance of finding the most significant digit (in base 10) in two different approaches:

1. **String Interpolation**: This approach uses template literals or string concatenation with `[0]` indexing to extract the first character of each number.
2. **Log-based**: This approach uses logarithmic calculation to determine the most significant digit.

**Options Compared:**
The benchmark compares the performance of two options:

* `String Interpolation`
* `Log based`

**Pros and Cons of Each Approach:**

1. **String Interpolation**:
	* Pros:
		+ Easy to implement
		+ Fast for small numbers
	* Cons:
		+ Slow for large numbers due to string creation and indexing
2. **Log-based**:
	+ Pros:
		+ Fast for both small and large numbers
	+ Efficient use of mathematical operations
	+ Less prone to errors compared to string manipulation
	+ Cons:
		+ Requires understanding of logarithmic properties

**Library Used:**
None explicitly mentioned in the provided code. However, it's worth noting that `Math.floor(Math.log10(n))` is a standard JavaScript library function used for logarithmic calculation.

**Special JS Feature/Syntax:**
No special features or syntax are required to run these test cases.

**Other Alternatives:**

1. **Regular Expressions**: Another approach could involve using regular expressions to extract the most significant digit, which might be more efficient than string interpolation.
2. **Math.max() with bitwise shift**: This approach would use `Math.max()` in combination with a bitwise shift operation to find the most significant digit. However, this approach is less readable and might not be as performant.

**Benchmark Preparation Code Explanation:**
The provided script preparation code creates an array of random numbers (`var randomNumbers = [0, 1, 632]`) and loops over it using `for...of` loop. Inside the loop, a console log statement is executed with either string interpolation or log-based approach.

**Individual Test Cases Explanation:**

* **String Interpolation**: This test case measures the performance of finding the most significant digit using string interpolation.
* **Log based**: This test case measures the performance of finding the most significant digit using logarithmic calculation.

Related benchmarks:

Most Significant Digit (version: 1)

Comparing the performance of finding the most significant digit (in base 10), utilizing string interpolation and also log().

Comparing performance of: String Interpolation vs Log based

Created: 9 years ago by: Registered User

Jump to the latest result

String Interpolation

Log based

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):