Well "this week's" is certainly an improvement. I guess I would still prefer
a paged chronological list of all posts (a timeline if you so will).
Because if you are new here you probably want to browse the last posts
and if you haven't visited for some time New Posts will be vanished after you log out.

>Search being the most expensive action to run on the DB it's understandable
>that there's a limit. I can reduce it to 10 or 15 seconds.

10 seconds is still ridiculous as there are only 15,538 posts and surely not many
queries per second. I think querying a million posts from a SQLite database
running on a Raspberry Pi 2 wouldn't take longer than a second.