Render operations take too long

[Pixdigit]

For a full discussion see:

Issue: Render operations take too long

TL;DR:
When doing render operations and immediately presenting the render the framebuffer has not been updated yet. ((I am kind of a noob concerning the low-level sdl so take it with a grain of salt))
This behavior per se is ok but not mentioned in the documentation. However before suggesting change I wanted to ask here is this might be an error.

[Blerg]

It does appear to be the behavior of native SDL2 when I run the C equivalent of the example which is this:

I can confirm that this happens. It only happens when changing the window in some way. So if you put a delay of ~50ms after the window size change, it should work properly again. I can post my test code if anyone is interested in it.