I did an update to the media substitution used in the RedCar 4K HEVC benchmark which pretty closely models my multicam HEVC workflow. It demonstrates how dramatic the performance penalty can be splitting and overlapping media clips in Vegas and/or using 4:2:2 clips instead of 4:2:0.

On my 4090 and 5080 systems, it yields better performance with 3 independent 60mbps 4k 4:2:0 HEVC tracks than the original which used 3 independent HD tracks: m2ts@13 mbps, mp4 @ 24 mbps, plus a 50mbps HD422 XDCAM. The zip also includes my old version with a media substitution scheme that referenced the same HEVC clip 3 times instead of using 3 separate copies... which is like splitting a clip in Vegas and overlapping it on itself. Which turns out to run quite a bit slower, especially on vp23 b302. The updated zip file can be downloaded here:

https://drive.google.com/file/d/1oNyunKSjcdUDHqKLvL-7V6ohDV1Jj24K/view?usp=drive_link

In order to play or render the new version, the included BAT file needs to be run to make 2 additional copies of the supplied HEVC clip. The included VEG projects are identical to the Sony original other than being saved after media substitution with vp16 so they'll work on all subsequent versions of Vegas.

Here are the render-time results I got on my 2 desktop workhorse systems: