Rails 5 provides fragment caching in Action Mailer viewsFragment cache helps in caching parts of the view instead of caching the entireview. Fragment caching is used when different parts of the view need to becached and expired separately. Before Rails 5, fragment caching was supportedonly in Action View templates. Rails 5 providesfragment caching in Action Mailer views. To use this feature, we need to configure our application as follows. config.actio
