Speed up (loading page, sell)
All is well until we have more or less 20 000 books in DB, we notice a slow down at each page load.
=> this is fixed
(the issue was introduced last year and wasn't always here)
Selling books is not lightning fast but works, until we want to sell around 100 books. It happens that the sell metadata is saved correctly (our revenue for the day is correct), but some cards are not sold.
=> selling has seen a x8 speed up. It is noticeable when we sell many books, it isn't really noticeable with 2-3 books. While we work on it more, it should be way better, but be careful. For really big sells, split them in two.