Setting cache_shaders to 1 should improve performance between game sessions
by saving processed shaders after loading something for the first time.

Enabling this will cause the game to lag initially as it generates files
but it will reduce loading times in the future
 
If you already have shader cache enabled, the following step
does not need to be repeated.

To enable shader cache, make a copy of ShaderCacheSettings.ini
and put it inside the RabbitFX folder.