OpenCL and HD4000 / Extern GPU (?)

Hello,

I am using a MacBook Pro 2012 (i7/HD 4000/8GB 1333Mhz). While I am quiet happy with overall performance, I am wondering if there is still room for improvement in C1.

Is CaptureOne taking advantage of this GPU HD4000 (OpenCL) ? Is there any benchmark tool (compared to CPU)? Would it improve performance to switch to 16Gb RAM? 1600Mhz RAM? Is it worth to look at external GPU over Thunderbolt to boost overall CaptureOne speed ?

Thanks
Have a nice day
(and fun)