How much more complex is it to draw simple curves, lines and circles in OpenGL ES rather than in Quartz 2D?

Question

Is OpenGL ES really so much faster? Why? And is it really so horrible complicated to draw such simple things in OpenGL ES compared to drawing these in Quartz 2D?

For

Answer 1

For simple things, Quartz 2D works fine, and it's really easy. Only move to OpenGL if you start having performance issues.