Is there any event thing in the blueprint, like BeginPlay/Tick?
If you want to see what is happening at runtime, I recommend using Unreal Insights.
- Open UnrealInsights.exe
- Play the game in Standalone Game
- Input ‘stat namedevents’ in Console to get more information for profiling
- You will get a new trace in Unreal Insights Session Browser, open it
- Check the problem
Don’t know what’s your blueprints like so there may be some differences, but you will find the Blueprint Time under Tick Time/TG_PrePhysics. In my test project the blueprint’s performance is fine, but you can image if there are complex events or something, it will be very time-consuming.
