Editor significant peformance regression

Development Platform & Builds Debugging, Optimization, & Profiling
1

Hello,

I’ve noticed significant performance regression that is triggered in two scenarios

  1. In editor viewport, hold right mouse button to move around scene, move around with wasd, then when you let go button, fpses go down to 5 - 10
  • HitProxyReadback seems to be involved somehow

image1

  1. Change active item in viewport, from Actor A to Actor B
  • Even bigger fps drop

image2
image2947×271 44.2 KB

Anyone knows what’s up?

2

I can confirm this is an issue with 5.4, and in 5.5 still not resolved.