Benchmark: eweewqe3 - MeasureThat.net

Script Preparation code:

  function toCommas1(number) {
    return number.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
  }
   function toCommas3(number) {
    return new Intl.NumberFormat('ja-JP', { style: 'currency', currency: 'JPY' }).format(number);
  }

Tests:

1
toCommas1(123456789)
3
toCommas3(123456789)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1
3

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.

I'll break down the provided benchmark definition and test cases to explain what's being tested, compared, and their pros/cons.

**Benchmark Definition:**
The benchmark is testing two different ways of formatting numbers with commas in Japanese Yen (JPY) format using JavaScript. The functions are:

1. `toCommas1(number)`: Uses a custom implementation to replace every third digit with a comma.
2. `toCommas3(number)`: Uses the `Intl.NumberFormat` API with the `ja-JP` locale and formatting options set to display numbers in currency format (JPY).

**Options Compared:**

* **toCommas1**: Custom implementation using regular expressions.
* **toCommas3**: Uses the built-in `Intl.NumberFormat` API.

**Pros and Cons of Each Approach:**

* **toCommas1**:
	+ Pros: Fast execution, simple code. However, it may not be as readable or maintainable due to the use of complex regular expressions.
	+ Cons: May have performance issues if the input numbers are large or have a specific pattern (e.g., very long sequences of zeros), which can cause slow regex engine execution.
* **toCommas3**:
	+ Pros: More readable and maintainable, as it uses a standard API. Additionally, `Intl.NumberFormat` handles edge cases like formatting very large numbers more efficiently.
	+ Cons: Slower execution compared to the custom implementation due to the overhead of using an internationalized formatting library.

**Library Used:**
The `Intl.NumberFormat` library is used in the `toCommas3` function. This library provides support for formatting numbers according to different locales, including Japanese Yen (JPY). The `Intl.NumberFormat` API returns a formatted string with the specified locale and formatting options applied.

**Special JavaScript Feature/Syntax:**
None mentioned in the provided benchmark definition. However, it's worth noting that the use of the `\\B` flag in the regular expression used by `toCommas1` is an escape sequence for backspace (\\B) followed by a group that doesn't consume any characters (`(?=...)`). This allows matching every third digit without including the comma.

**Other Alternatives:**

* **Using JavaScript libraries like Moment.js**: Instead of using the `Intl.NumberFormat` API, developers could use libraries like Moment.js to format numbers with commas and other formatting options.
* **Using custom implementation with a loop**: Another alternative is to use a simple loop to add commas to the number string manually. However, this approach would likely be slower and less efficient than using either the `Intl.NumberFormat` API or the regular expression-based `toCommas1` function.

In conclusion, the benchmark definition tests two different approaches for formatting numbers with commas in Japanese Yen format: a custom implementation using regular expressions (`toCommas1`) and a built-in internationalized formatting library (`toCommas3`). The choice between these approaches depends on performance requirements, readability, and maintainability preferences.

Related benchmarks:

eweewqe3 (version: 0)

e

Comparing performance of: 1 vs 3

Created: 3 years ago by: Guest

Jump to the latest result

1

3

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):