High poly lag limitation of blender? I have a lag problem with my high poly model 12000000 poly, I made a quick video to illustrate my problem 
https://youtu.be/luvN2IeYqNg
When the mouse is out of the 3d view it lags a lot. I have to unselect the model, select an other or refresh the page to have no more lags
I have a quatro m5000
A gtx 1080
2x xeon e5 v4 2,4 ghz
256go ram
Ssd drive 
All drivers are ok 
I should be smooth ! 
The problem is coming from my computer ? Blender ? 
I need to work on high poly models for my work in archaeology
I remeshed, with meshlab and reduced the model to 3millions poly ant no more lags I definitely thinks it's a blender issue :(