Speed comparison of OpenCV v1.1, v2.0, v2.1 and v2.2

http://opencv-users.1802565.n2.nabble.com/Speed-comparison-of-OpenCV-v1-1-v2-0-v2-1-and-v2-2-td6442365.html

Yes it seems that some very basic operations such as copying an image or matrix or using Regions Of Interest or direct pixel access that have slowed down a lot, because the C++ interface sometimes creates temporary image copies during operations whereas the C interface accessed the data directly, etc. I did not bother tes