Multiple Scene Viewports reduces performace by a lot!

[MohitSethi99]

How to Reproduce:

• Run the engine
• Note the frame time
• Add one more scene viewport by going to Menu Bar, Window>Add>Viewport
• Note the frame time, should be around x15 higher than single viewport which is not acceptable frame time.

Result:

Two scene viewports with an empty scene can bog down the performance taking 20+ms

Expected:

Adding more Scene Viewports is bound to degrade performance but not at this scale

More Info:

One scene viewport, CPU time: 1.227ms

Two scene viewports, FPS: 20.35ms

[MohitSethi99]

Seems like the pipeline is being stalled by framebuffers because they are resized quite a lot between frames