Could probably help to send multiple smaller, non-blocking packets instead of 1 large one.

It seems like grid loading is no longer slow with the tooltip caching introduced in da0b2b4.

In 4fda0e3 I introduced debug disks.
Trying to open a grid (in single player, All The Mods 10) using a debug disk with 57742 unique items, the grid can still be opened very quickly (a very small lag spike, but barely noticeable).

That means we will probably not need any paging system etc.

Closing.