This is a prototype of particle-based music visualization stage for our upcoming VR game Beat the Rhythm: store.steampowered.com/app/781200/Beat_the_Rhythm_VR/
In this video, we compare performance of using Unity's new Visual Effect Graph, in Unity 2018.3.2f1: First with HDRP, which does look a little better, but has unacceptable performance (this is on a GeForce 980Ti). Then, at 2:18, we use a build where we used Unity's legacy render pipeline - and even at the craziest particle counts (8x what we had originally planned), performance is butter smooth.
One interesting thing about this is also that when we reduce the particle count to "basically nothing", we have 2-3ms per frame GPU time in legacy, and about 6-7ms per frame GPU time for HDRP. So, for now, it very much looks like HDRP will only really work for VR on very high end hardware (in other tests, rendering just a single cube, I got around 5ms or 6ms per frame).
