Performance in editor not reflected in build

Hi there,

I’m really excited about the new additions to 4.13. More specifically the improvements to performance on movable lighting. My environment is 90% movable lighting with much of the environment set to movable meshs (besides structural) as they can be interacted with. in 4.12 I was getting above 60fps at all times in the editor and in the build. In 4.13 I’m getting 100-120fps in the editor (woohoo) and 40-50fps in the build. I also notice in the editor the FPS drops by about 40fps if I have any editors open (like blueprint), closing them doesn’t bring the FPS back, I have to restart unreal. I assume this might be because much of the environment isn’t set to static but that doesn’t explain why it performs so well in the editor If I don’t open blueprint.

My lights are movable point lights and cast shadows.

A side note, I’m also using a planer reflection for a mirror. In 4.12 the FPS when looking in to that was above 60. in 4.13 its around 30, I assume again that this might be to do with the lighting.

I’ve had a look online but there isn’t too much out there just yet.

I’d really love to not have to roll back to 4.12 so is there anything I can do about this?