I use a very basic vanilla Twig configuration and just started creating my first Twig templates, and noticed my templates are not being cached.

When running php app/console debug:container --env dev --show-private --tag kernel.cache_warmer the TemplateCacheCacheWarmer service does not appear - this is also the case when reinstalling Symfony without doing any configuration or changes at all. When running php app/console cache:warmup in a new project, the twig directory in /app/cache/dev (or /app/cache/prod) is not being created and no templates are "warmed up".

Does template caching have to be enabled or configured? I could not find anything in the documentation or anywhere else on how to enable template warmup caching.