Since V14 the Timeline performance sadly got worse with every version of Vegas. At least for me on 4 different Systems.
I gave V17 a try because of many interesting new features and especially the NVDecode support for the preview.
With my 10bit GH5 files at 150Mbits non Intra nothing gets accelerated. Something noteworthy is that if you just put a videofile on the timeline and don`t change anything, the file plays back at full speed 24p (20% CPU and GPU)at Full Quality Preview) but as soon as i only do a single cut everything goes down to 1 FPS even at draft quality (maybe 4 FPS) as the cut happens.
My main Workstation i an X399 TR 1950x, NVIDIA 1080ti Strix, 64 GB RAM and NVME Editing Drive Samsung PRO 960 on an ASUS Zenith.
The same happens on my 10 Year old 6 Core Intel workstation wich surprisingly also plays back the File in Vegas as long as it is not split or shortened.
On another consumer grade PC I7 Kabylake 3.4GHz Quadcore NVIDIA 1050 the video does not play well from the start at about 10FPS with or without NVDECODE.
Is anyone out there happily edting GH5 10 bit footage in vegas ? I probably read every single topic from the last few years about Vegas performance as i don`t want to give it up but nothing really helped. Even proxyfiles are slow as soon as i do a single cut with them, although interestingly they work alot better on my Kaby Lake consumer PC even when editing. Does somebody know what is going on ?
A few years back i tried 4k 60P 8bit footage with vegas 15 and practically the same happend. Everything fluid as long as i don`t touch the clip in any way. Same with the proxies. Seems to me as if there is something going on with the way Vegas buffers the read ahead in recent years.
I remember with vegas 13 back in the day when working with 1080p footage everything ran ok even on my C2Duo PC.
Any Info is much appreciated.