directx config lag on virtual machine

Hi,

Despite of it works fine on physical machine Windows 10, gvim 8.0.1406 lags on virtual machine AMD 64 Seven.

set guifont=Noto_Mono_for_Powerline:h9:w5:cANSI:qDRAFT
set rop=type:directx,gamma:0.1,contrast:0.1,level:0.2,geom:2,renmode:6,taamode:2



Just forward/backward page command lags.

Is there a way to set diagnostic ?
Thank you

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