The devs have put a text file on the newest version of FHSW. I've found some crucial information about loading time reduction (how it works) and the implementation of destroyable objects on maps.
There is also a note on the amount of these objects and how they could possibly cause crashes on certain maps. And also how to solute these!
*For mappers and mini-modders! in FHSW 0.55, file structures in "objects.rfa" were heavily modified, to shorten map loading time. This file is extremely difficult to reading, and very inconvenient for mappers/ modders. We therefore prepared "objects_for_moddrs.rfa", which has regular file structure. Please use it for making maps/mini-mods!
We made "animation file reading flags", to shorten map loading time. This flags are basically divided by nations. If some flags are "0", animation files of these nations hand weapons will be skipped. You can shorten map loading time by setting these flags. For details, see "animations" folder in any of FHSW maps. note: "USA" weapons flag is always "1". You can not skip loading American hand weapons.
*For mappers! In FHSW0.55, some buildings/trees are breakable. By this change, some map which has too many breakable objects may be crush in multiplayer game, because of limit of objects number. We are thinking that the number of those breakable objects (including vehicles) must be about below 800. If you want to put "unbreakable" version of these objects, please add the prefix "DEF_" like "DEF_churcfence_m1". Also you can change whole objects in the map. Examples are in "Air_Raid_Alert_-Kure-1945" map, "_UnBreakable_Buildings" folder and "_UnBreakable_Trees" folder.