Why do we need caching for intl objects?

[ahrabovenskyi]

Hey guys!
This is from example of formatjs using with Node on your website:

// This is optional but highly recommended
// since it prevents memory leak
const cache = createIntlCache()

// Create the `intl` object
const intl = createIntl(
  {
    // Locale of the application
    locale: 'fr',
    // Locale of the fallback defaultMessage
    defaultLocale: 'en',
    messages: messagesInFrench,
  },
  cache
)

If we should support only to locales, for example, fr and de, then it's just enough to create 2 intl objects and reuse them in any place in code:

const intl_fr = createIntl(
  {
    locale: 'fr',
    defaultLocale: 'en',
    messages: messagesInFrench,
  }
);

const intl_de = createIntl(
  {
    locale: 'de',
    defaultLocale: 'en',
    messages: messagesInGerman,
  }
);

if (user_locale == "fr"){
   intl_fr.formatMessage(...);
} else {
   intl_de.formatMessage(...)
}

The question is: do we need caching in this case where we just reuse the same 2 intl objects? Thanks!

[longlho]

cache is always optional and I'd recommend adding it if it becomes a bottleneck for you