HVEC (H265 using GTX 1070 Ti Driver Studio 451.77) is the fastest encoder for me.
I've tried several standard options on the same clip:
Fast Main Main QP13 = 1077 sec & 970 MB
HQ Main Main QP13 = 1076 sec & 964 MB
HQ Main Main QP15 = 1073 sec & 763 MB
Slow Main Main QP15 = 1072 sec & 763 MB
Slow Main High QP15 = 1061 sec & 763 MB
Slow Rext High QP15 = 1078 sec & 763 MB
=> The overall time is the same, using Fast/Slow/High Quality, Main/REXT Profile or Main/High Tier (that's strange to me)
I suppose that Vegas Rendering is actually holding back the encoding.
So, for my next benchmark, I'd like to force higher compression (lower file size without reducing quality).
I suppose I need to dig into the Advance Option?
What would be the suggestion to increase compression on a 4k 30 FPS clip?