Hi!
I have some questions about module-wide option (in Preferences Main -> General Settings):

1- I want to reduce SQL query, is 'module-wide option' the solution?
2- When modules will be cached? when users visit the module's pages or when a new story is posted?
3- What will be cached? (single visited story, module index page, comments, other, ...)
4- If modules are cached and users posts comments, will new comments immediately visibles?