All tutorials use VAOs in a very inefficient way about ogl HOT 1 CLOSED

Skipping VAOs entirely was a deliberate decision.

First, I have yet to see a bench that makes VAOs more efficient (it may have changed since the tutorials were written).

Secondly, it makes the rendering loop more intuitive - there is one less abstraction layer to understand.

But most importantly, the tutorials were designed to be portable across many OpenGL versions - including OpenGL 2, which still has a important user base on old hardware. It's also not supported in ES until 3.0.

I also chose to re-bind everything each frame because that's closer to what needs to be done in real application, where you can't just assume that only one objects gets drawn.

So, when I finally ditch the 2.1 port (still useful to many people), or if there's a compelling reason to change all the tutorials, I'll update them, but in the meantime, I think it's a good compromise.

from ogl.