[4.6] Terrible rendering performance in (Test / Shipping) vs Debug

(This is copy of my forum thread, located here, but now on the AnswerHub for support).

We’re spawning in a few thousand basic cubes at runtime, and have fantastic performance running a DebugGame build out of Visual Studio (with a debugger attached, no less!), but running the “Test” build configuration (both Win32 and Win64), which is like a shipped build but with profiling enabled, we get horrible render performance - fps: 200 vs ~20.

Why is there such terrible performance in what should be the superior build configuration? The render thread and GPU are getting totally hammered!

Thanks!

Hi, We have the same issue with unreal 4.7: a shipped build runs slower than a development build. Any idea ? Thanks.

We are having the same issue on UE4.16.3, on Development GPU is 16ms, while on shipping build is on 22ms!!??

We need help with this please!