Please report CS:GO linux client issues at https://github.com/ValveSoftware/Counter-Strike-Global-Offensive.
Issue was transfered to https://github.com/ValveSoftware/Counter-Strike-Global-Offensive/issues/159.
Considering csgo uses ToGL, that would explain the inferior performance compared to Windows. I can't wait for csgo to get ported to source 2 so it has native Opengl support.
Nothing extracted yet.
I know the port for CSGO is still very new, but I thought I would mention that my performance in the Linux port is half of what Windows can do. In Windows, I get an average of 100FPS, but in Linux, I get 50FPS on average.
My specs are in my Steam profile, which is linked in my Github page.