what ur go to for caching stuff u access a lot like small static data

hey every1 im tryin to optmize some read-heavy parts of an app. for complex query results, redis is usually the answer, but for smaller, static blobs of data that dont change often like config settings or user prefs, what are u all using? is it still redis, or somethin simpler like in-memory caching within the service itself, or perhaps a dedicated cdn if its truly static and public-facing? curious about the trade-offs u consider