Benchmark: checking 2 fun locale array creation

Script Preparation code:


var NumberFormatUtils = {
    format: (locale, number) => number.toString(),
    formatToParts: (locale, number) => [
        { type: 'decimal', value: '.' },
        { type: 'minusSign', value: '-' },
        { type: 'group', value: ',' }
    ]
};

var STANDARD_DIGITS = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.', '-', ','];

var INDEX_DECIMAL = 10;
var INDEX_MINUS_SIGN = 11;
var INDEX_GROUP = 12;

var LOCALE_TEST = 'en-US'; // Example locale

Tests:

Original
const getLocaleDigitsOriginal = (locale) => { const localeDigits = [...STANDARD_DIGITS]; for (let i = 0; i <= 9; i++) { localeDigits[i] = NumberFormatUtils.format(locale, i); } NumberFormatUtils.formatToParts(locale, 1000000.5).forEach((part) => { switch (part.type) { case 'decimal': localeDigits[INDEX_DECIMAL] = part.value; break; case 'minusSign': localeDigits[INDEX_MINUS_SIGN] = part.value; break; case 'group': localeDigits[INDEX_GROUP] = part.value; break; default: break; } }); return localeDigits; }; getLocaleDigitsOriginal(LOCALE_TEST);
Improved one
const DIGITS = [INDEX_DECIMAL, INDEX_MINUS_SIGN, INDEX_GROUP]; const getLocaleDigitsOptimized = (locale) => { const localeDigits = []; // Set standard digits for (let i = 0; i <= 9; i++) { localeDigits[i] = NumberFormatUtils.format(locale, i); } // Set standard symbols (decimal, minus sign, group) DIGITS.forEach((index) => { localeDigits[index] = STANDARD_DIGITS[index]; }); // Update locale-specific symbols NumberFormatUtils.formatToParts(locale, 1000000.5).forEach((part) => { switch (part.type) { case 'decimal': localeDigits[INDEX_DECIMAL] = part.value; break; case 'minusSign': localeDigits[INDEX_MINUS_SIGN] = part.value; break; case 'group': localeDigits[INDEX_GROUP] = part.value; break; default: break; } }); return localeDigits; }; getLocaleDigitsOptimized(LOCALE_TEST);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Original
Improved one

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

The provided benchmark tests two approaches to locale-dependent digit creation in JavaScript, specifically for the English (US) locale.

**Original Approach**

In the original approach, the `getLocaleDigitsOriginal` function iterates over the standard digits (0-9) and formats each one using `NumberFormatUtils.format(locale, i)`. This creates a new array with formatted digits. Additionally, it extracts the decimal, minus sign, and group symbols from `NumberFormatUtils.formatToParts(locale, 1000000.5)` and updates the corresponding positions in the digit array.

**Improved Approach**

The improved approach uses an optimized version of the same logic but with some key differences:

* It pre-sets the standard digits and symbols in a separate array (`STANDARD_DIGITS` and `DIGITS`, respectively).
* It sets these pre-defined values for the decimal, minus sign, and group positions directly.
* Finally, it updates the locale-specific symbols from `NumberFormatUtils.formatToParts(locale, 1000000.5)`.

**Pros and Cons**

* **Original Approach:**
	+ Pros:
		- Easy to understand and implement.
		- Uses the full capabilities of `NumberFormatUtils`.
	+ Cons:
		- May be slower due to the additional formatting steps.
* **Improved Approach:**
	+ Pros:
		- Optimized by reusing pre-defined values for standard digits and symbols.
		- Faster execution since fewer function calls are required.
	+ Cons:
		- Less readable due to the use of magic numbers and direct assignments.

**Other Considerations**

When working with locale-dependent formatting in JavaScript, it's essential to consider the following:

* The `NumberFormatUtils` library is a built-in part of the ECMAScript standard (ECMAScript 402) and provides consistent formatting across browsers.
* When using this library, be aware that its behavior might vary slightly between browsers due to implementation differences.

**Library: NumberFormatUtils**

The `NumberFormatUtils` library is a set of utility functions for working with numeric values in JavaScript. Its primary purpose is to provide a standardized way of formatting numbers and extracting their parts (decimal, minus sign, group, etc.). This library is implemented as part of the ECMAScript standard.

**Special JS Features/Syntax**

None mentioned in this benchmark.

**Alternatives**

If you need to create locale-dependent digit arrays or perform similar formatting tasks, consider using alternative libraries or approaches:

* `Intl.NumberFormat` API: A more modern and widely supported way of working with numeric values and locales.
* Custom implementations: Depending on your specific requirements, creating a custom implementation might be more efficient than relying on the `NumberFormatUtils` library.

When optimizing performance-critical code, it's essential to weigh the trade-offs between readability, maintainability, and execution speed. The improved approach in this benchmark offers a balance between these factors but may require additional testing to confirm its performance benefits in all scenarios.

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser/OS: Chrome 126 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Original	1457358.9 Ops/sec
Improved one	1030006.0 Ops/sec

Related benchmarks:

checking 2 fun locale array creation (version: 0)

Comparing performance of: Original vs Improved one

Created: 5 months ago by: Guest

Jump to the latest result

Original

Improved one

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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