I'm investigating the way to draw bezier curves / nurbs etc. with shaders, here is a list a links and information I found that can improve render times with OF. Any way I must admit I'm new to openGL & shaders so maybe someone can take this to implement maybe an add-on or maybe to added to the core.
Resolution Independent Curve Rendering using Programmable Graphics Hardware https://www.microsoft.com/en-us/research/wp-content/uploads/2005/01/p1000-loop.pdf
Resolution independent GPU accelerated Curve & Font rendering GPU based Resolution Independent Font & Curve Rendering – initial Release http://jausoft.com/blog/2011/04/01/resolution-independent-gpu-accelerated-curve-font-rendering/ http://ramisantina.com/blog/?p=73 http://vimeo.com/21810192 http://jogamp.org/doc/gpunurbs2011/p70-santina.pdf
Curvy blues http://www.mdk.org.pl/2007/10/27/curvy-blues
Vector drawing: OpenGL shaders and cairo & vector hardware tessellation http://www.mdk.org.pl/2007/8/6/vector-drawing-opengl-shaders-and-cairo
ShivaVG & Random Access Rendering of Animated Vector Graphics http://ivanleben.blogspot.com.es/2007/07/shivavg-open-source-ansi-c-openvg.html http://www.youtube.com/watch?v=mD8X-e5-sY4 http://www.youtube.com/watch?v=U4USCfwORUg http://andrejas-atelier.com/ivan/IvanLebenHonsThesis.pdf
RAVG http://research.microsoft.com/en-us/um/people/hoppe/proj/ravg/
NV Path Rendering Videos (seams only with nvidia) http://developer.nvidia.com/nv-path-rendering-videos
Vector drawing: OpenGL polygon tessellation http://www.mdk.org.pl/2007/8/16/vector-drawing-opengl-polygon-tessellation http://zrusin.blogspot.com.es/2006/07/hardware-accelerated-polygon-rendering.html