intlify/vue-i18n

AI Summary: The `@intlify/core-base` library in development mode unconditionally calls `performance.mark()` and `performance.measure()` for every translation function invocation. This creates significant overhead, especially in applications with many components and frequent translations, leading to distorted performance profiling and slower development cycles. The suggested solution is to make these performance measurements opt-in, similar to Vue's `app.config.performance` flag.

AI Summary: The `vue-i18n` library's `createI18n` function fails to correctly pass the `availableLocales` option to the global instance if the `messages` option is not also provided. This leads to `i18n.global.availableLocales` only containing the `locale` value, rather than the explicitly defined `availableLocales` array, when `messages` is absent.