How does the VKontakte message screen render

How to display a very large message and don't kill UiThread? How to reduce scrolling delays in RecyclerView?

In this talk Alexander will tell about:

• approaches used by VK to speed up message screen rendering;
• RecyclerView cashing settings;
• custom solutions and crutches.

This talk is not about something, in particular, it's about what VK does (or wants to do) to reduce rendering lags.