I meant to say "bind data to elements". It's been a while since I programmed in OpenGL so the terminology is shaky. I saw your other answer below too. I am not

I meant to say "bind data to elements". It's been a while since I programmed in OpenGL so the terminology is shaky. I saw your other answer below too. I am not able to visualise how the duplicate data could affect caching postively. But anyway, I don't have deep knowledge about the hardware. And I didn't know other 3D APIs had the same problem. Thanks for mentioning that.