Inconsistent editor performance

Development Programming & Scripting
1

Hello everyone,
I would like to share with you one problem that i have lately and has to do with huge performance drops when i am viewing a blueprint with a lot of actions and conditions.
First of all i would like to share my PC specs so we can establish baseline performance.

AMD fx 8350 at 4.6 GHZ

16 gb RAM 1833

SDD 250GB SAMSUNG

SAPPHIRE TRI-X R9 290 4GB GDDR5 OC

All this power up 3 X 1080p monitors at a combined resolution of about 6000x1080(with bezel compensation).
Most of the time i am at >140fps. even if i have my editor open(all three monitors) and press play on a separate window.Then the editor drops to about 75 fps and the game runs at another 75 fps to a combined >140fps which is perfectly normal.

Now for the weird part.
When i open my main character BP that has a ton of nodes and functions then after a while my editor performance drops to 8 FPS!! and stays there for ever.
It has nothing to do with throttling since my GPU and CPU are not even being pushed hard and they are 30 degrees below maximum temps.
The moment i click to another blueprint with very little stuff in it then the engine goes up to 70 fps(note not >140).I click back to my main character BP and i drop to <10 again.
What the heck is going on?
If i stay at my main characters BP and press play to preview from within the editor then i am stuck with horrendous frame rates.If instead preview with the external window it goes back to >70 at the window and >70 at the editor that is running in the other 2 screens.
Somethings fishy here.
Any ideas?

2

I faced the same case too. Not as dramatic as your case, but the FPS drops around 30% after a couple of game test in editor.

3

Yes ,you are absolutely right.It slows down after each preview.I forgot to mention this.

4

Hi ,

The Blueprint Editor is doing a lot behind the scenes while just being open and even more when editing or debugging. The larger a blueprint becomes the more taxing it is going to be on your PC to have open. The ‘rather large’ CharacterBlueprint in my testbed causes my fps to drop from 110 to 30 when opened.

If this is becoming a major issue for you, try breaking up your CharacterBlueprint into parts. For example, you can move anything that you plan to allow all characters to do to the PlayerController.

TJ