Maxx asked a guy on reddit about it and we both have the files now, poking around a bit shows more things such as models for molotovs, portal test chamber concept things, platformer maps, etc
Do it at home:
Requires 16GB of free space (yeah, holy stuff)
SteamVR Performance Test
Okay then, first you need to get the DepotDownloader, which you can find here: https://drive.google.com/file/d/0BxJhwHfIHj20eWxXaFhScUFCVTA/view?usp=sharing Unpack that somewhere. Open up a CMD in Windows, cd to the folder the downloader is in and execute it like this: DepotDownloader.exe" -app 323910 -depot 323911 -manifest 1213373041379618053 -username yoursteamusername -password yoursteampassword (Of course replace the login with your actual login. If you have steamguard activated you have to enter the security code after you press enter. It'll ask you for it.) YOu might get a few error messages, which is okay, it will start downloading after a while. It downloads the entire thing (16GB) to your User folder (C:\Users\Yourusername\depots).
it seems suspicious at first with the password thing but its actually in order to get into valves servers
ie valve wont let some anonymous random ip download stuff from their servers
after the files are downloaded you go into the vr folder in depots and copy maps, materials, models, scripts, and sounds into the vr folder of the test
go to preferences for the performance test and add "-novr" and accept
removes the vr screen and makes the test endless
just a warning that maps like strider canyon still crash the game
