We've created an environment for testing your system performance capabilities. Basically, it contains a 4 seconds video with 80 layers of color correction created. There, you can remove layers until real-time playback is obtained or sound synchronization is achieved.
You guys can find the environment attached in this post. It is a 1920x1080 and 24 fps timeline. The video file which you have to relink can be found here.
This is how the environment looks like: