i think adding cv::TickMeter class in the library will be fine.

there is open questions at answers.opencv.org
http://answers.opencv.org/question/67009/why-tickmeter-class-only-used-in-the-gpu-samples/
http://answers.opencv.org/question/69035/tickmeter-class-removal-and-how-to-replace-it/

PS: if some core developer confirm and suggest the proper module ( i think it can be merged in core module). i will try to supply Pull Request.