Displacement

[glorybound]

I have a tile wall, with 2d displacement (everything is default), but it brings my scene to a slow crawl when rendering. With displacement it renders in 11 hours and without it renders in 3 hours. I have a dual Xeon and I remember hearing there might be an issue. Any tips?

[Companioncube]

what are your displacement settings? what kind of texture are you using (size, format)? are you using max bitmap loader or vrayHDRI loader?