Nope, doesnt work. :(

Is there any real fix for this?
Because I have the same Problem.
After I start ARMA 3 and choose Play > Multiplayer I have to wait 30-50 minutes until it's loaded. When watching this in Windows Task Manager, theres no load on CPU and SSD, no increase in used RAM and no increased network traffic.
The process is marked as inactive.

Details to my system:
CPU: 4 cores clocked at 4 GHz (Haswell)
RAM: 16 GB clocked at 1,9 GHz
GPU: NV GTX770
SSD: Samsung 840 EVO 250 GB
OS: Windows 8 64 bit