Ygtjki

I am trying to run an application in a different 'fake' X display, but I noticed that the performance (FPS) of the application if much smaller than in my original X display.

I tried to use Xephyr, Xvfb and other similar solutions to create the new display and I run my application there. The problem is that the FPS in the new display is far below the one I was expecting. Even with virtualGL, the performance is still far below the one in my original display.

I did some tests using glxgears, and here are the results:

If I run glxgears in my current display it shows:

$ vblank_mode=0 glxgears -info
GL_RENDERER = Mesa DRI Intel(R) HD Graphics 615 (Kabylake GT2) 
GL_VERSION = 3.0 Mesa 13.0.6
GL_VENDOR = Intel Open Source Technology Center
36686 frames in 5.0 seconds = 7337.035 FPS

Now if I start a new X display and run glxgears there I get:

$ Xephyr/Xvfb :1 ..
$ DISPLAY=:1 vblank_mode=0 glxgears -info
GL_RENDERER = Gallium 0.4 on llvmpipe (LLVM 3.9, 256 bits)
GL_VERSION = 3.0 Mesa 13.0.6
GL_VENDOR = VMware, Inc.
7315 frames in 5.0 seconds = 1462.783 FPS

Even with VirtualGL, the fps is still low.

$ Xephyr/Xvfb :1 ..
$ DISPLAY=:1 vblank_mode=0 vglrun glxgears -info
GL_RENDERER = Mesa DRI Intel(R) HD Graphics 615 (Kabylake GT2) 
GL_VERSION = 3.0 Mesa 13.0.6
GL_VENDOR = Intel Open Source Technology Center
9473 frames in 5.0 seconds = 1894.576 FPS

Is there a way to create a new X display that has the same capabilities as my current display (high FPS), so that I can run my application?