[no-]use-deferred-loading

Specifies whether to generate the Dart localization file with locales imported as deferred, allowing for lazy loading of each locale in Flutter web.This can reduce a web app’s initial startup time by decreasing the size of the JavaScript bundle. When this flag is set to true, the messages for a particular locale are only downloaded and loaded by the Flutter app as they are needed. For projects with a lot of different locales and many localization strings, it can improve performance to defer loading. For projects with a small number of locales, the difference is negligible, and might slow down the start up compared to bundling the localizations with the rest of the application.Note that this flag doesn’t affect other platforms such as mobile or desktop.

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