Benchmark: Number.toLocaleString vs Intl.NumberFormat3

Tests:

Intl.NumberFormat
const currencyPlayNumber = 1; const formatter = new Intl.NumberFormat(undefined, { style: 'currency', currency: 'RUB', }); for(var i = 0; i < 10000; i++) { let formatted = formatter.format(currencyPlayNumber); }
Number.toLocaleString
const currencyPlayNumber = 1; for(var i = 0; i < 10000; i++) { let formatted = currencyPlayNumber.toLocaleString(undefined, { style: 'currency', currency: 'RUB', }) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Intl.NumberFormat
Number.toLocaleString

Fastest: N/A

Slowest: N/A

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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 benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark is comparing two JavaScript methods for formatting currency: `Intl.NumberFormat` and `Number.toLocaleString`. The benchmark definition specifies that it will test these two methods on a number between 0 and 1 (inclusive), which represents a currency value in Russian Rubles (`RUB`).

**Options Compared**

Two options are being compared:

1. **Intl.NumberFormat**: This method uses the `Intl` API to format numbers according to a specified locale, style, and currency.
2. **Number.toLocaleString**: This method formats numbers using the `toLocaleString()` method, which returns a string representation of the number in the current locale.

**Pros and Cons**

Here are some pros and cons of each approach:

**Intl.NumberFormat**

Pros:

* Highly customizable: Can be tailored to specific locales and currencies.
* Supports advanced formatting options, such as percent signs and decimal separators.
* Typically faster than `Number.toLocaleString`, especially for complex formatting tasks.

Cons:

* More complex API: Requires a deeper understanding of the `Intl` API and locale settings.
* May have slower performance due to the overhead of creating an internationalization object.

**Number.toLocaleString**

Pros:

* Simpler API: Easier to understand and use, especially for basic formatting needs.
* Typically faster than `Intl.NumberFormat`, since it doesn't require creating a separate internationalization object.
* Works well with most browsers' locales out of the box.

Cons:

* Less customizable: Limited options for customizing formatting, style, and locale.
* May not work as expected in certain locales or with complex formatting requirements.

**Library and Purpose**

In this benchmark, the `Intl` library is being used to provide internationalization features. The `Intl.NumberFormat` method leverages this library to format numbers according to a specified locale and currency.

**Special JavaScript Feature or Syntax**

This benchmark uses some advanced JavaScript features:

* **Template literals**: Used in the `Intl.NumberFormat` method's formatting string.
* **Arrow functions**: Used in the `for` loop's callback function.
* **Variable declaration with `var`**: Used to declare variables in the script preparation code.

However, note that these features are widely supported across most modern browsers and JavaScript engines.

**Other Alternatives**

If you wanted to write a similar benchmark, you could consider using other methods for formatting currency, such as:

* Using CSS to style numbers (e.g., `:before` pseudo-element)
* Employing a custom library or utility function for formatting currency
* Comparing the performance of different JavaScript libraries or frameworks for rendering numbers

Keep in mind that each approach has its pros and cons, and the best method will depend on your specific use case and requirements.

Related benchmarks:

Number.toLocaleString vs Intl.NumberFormat3 (version: 0)

Comparing performance of: Intl.NumberFormat vs Number.toLocaleString

Created: 4 years ago by: Guest

Jump to the latest result

Intl.NumberFormat

Number.toLocaleString

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):