I wonder if it's normal I'm getting fps drops every 2 minutes (5-10 fps during 1 second)? Otherwise, it's running at 30-60 fps. Resolution 2196x1080. 2 HD outputs. 2 or 3 layers. Dxv3 normal, without alpha, 7.0.3
My system:
MacBook Pro (Retina, 15-inch, Mid 2015)
2.5 GHz Intel Core i7
16 Go 1600 MHz DDR3
AMD Radeon R9 M370X 2048 Mo
Intel Iris Pro 1536 Mo
tested on 10.13 and 10.11
The video files are located on an external SSD connected in usb 3.
I think it's taking more ressources when the outputs are physically connected. Without the outputs connected, it stays steady at 60 fps.