The presentation deals with the practical examples of the optimization levels in the context of the C++ language features and dwell upon the data-oriented design evaluation methods. The presentation materials were co-authored with Oleksandr Markov (Senior Software Engineer, Consultant, GlobalLogic, Kharkiv) and was delivered by Oleksandr Antsyferov (Senior Software Engineer, Consultant, GlobalLogic, Kharkiv) at GlobalLogic Kharkiv C++ TechTalk #1 on May 16, 2018.