[Cura 2.1.2 - Why is it so slow ??? Any Fix ?]

Hi,

I was using S3D at my friend's business and at home I wanted to use Cura so I tried the 2.1.2 It's working very well, but why is it soooooo slow ?

I have cura 15.04.6 and it even slice and show the layers way faster. Is it a compatibility problem with QT's driver or something like that ??

If it's a configuration fix it would be nice to share the workaround !!

Thanks