In one of my previous post I wrote about performance differences between using vector<Obj> and vector<shared_ptr<Obj>>. Somehow I knew that the post is a bit unfinished and need some more investigation. This time I will try to explain memory access patterns used in my code and why performance is lost in some parts.

After watching some of the talks from Build 2014 - especially “Modern C++: What You Need to Know” and some talks from Eric Brumer I started thinking about writing my own test case. Basically I’ve created simple code that compares vector<Obj> vs vector<shared_ptr<Obj>> The first results are quite interesting so I thought it is worth to describe this on the blog.