Benchmark: Slice vs Substring for formatting HS codes

Script Preparation code:

var code = '3926909790'

Tests:

full code with slice
var formattedCode = `${code.slice(0, 4)} ${code.slice(4, 6)} ${code.slice(6, 8)} ${code.slice(8, 10)}`
full code with substring
var formattedCode = `${code.substring(0, 4)} ${code.substring(4, 6)} ${code.substring(6, 8)} ${code.substring(8, 10)}`

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
full code with slice
full code with substring

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 what's being tested on MeasureThat.net.

The benchmark is designed to compare the performance of two ways to format strings in JavaScript: using `slice()` and using `substring()`. The test case involves formatting a specific HS code (a 10-digit code) into a string with four parts, separated by spaces.

Here are the options being compared:

1. **`slice()`**: The `slice()` method returns a subset of characters from a string, starting at the specified start index and ending at the specified end index (exclusive). In this case, it's used to extract individual parts of the HS code.
2. **`substring()`**: The `substring()` method returns a subset of characters from a string, starting at the specified start index and ending at the specified end index (inclusive).

Pros and Cons:

* **`slice()`**:
	+ Pros: Can be more memory-efficient because it doesn't create a new string.
	+ Cons: May not work as expected if the indices are large or out of range, since `slice()` will return an empty string in those cases.
* **`substring()`**:
	+ Pros: Works consistently and predictably, even for large or invalid indices.
	+ Cons: Can be less memory-efficient because it creates a new string.

Now, let's look at the libraries used in these tests. In this case, none are explicitly mentioned in the benchmark definition. However, both `slice()` and `substring()` are built-in JavaScript methods, so no external library is required.

Next, there are no special JavaScript features or syntax being tested here.

Finally, let's consider some alternatives:

* **Using template literals**: If the test case involved formatting strings using template literals (`${expression}`), it might be a good alternative to `slice()` and `substring()`. Template literals can provide more flexibility and readability in string formatting.
* **Using regular expressions**: Regular expressions could also be used to extract parts of the HS code, but they would likely be overkill for this specific use case.

In summary, the benchmark is designed to compare the performance of two ways to format strings: using `slice()` and using `substring()`. The test case involves formatting a specific HS code into a string with four parts. While there are pros and cons associated with each approach, both methods work consistently in this scenario.

Related benchmarks:

Slice vs Substring for formatting HS codes (version: 0)

Comparing performance of: full code with slice vs full code with substring

Created: 3 years ago by: Guest

Jump to the latest result

full code with slice

full code with substring

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):