Nicolas Heluani wrote:wow,
It seems that is a common problem out there.
I am using a nVidia Quadro K4000 for a GPU, again plenty for HD resolution, on a windows 7 machine.
So I really doubt that is a GPU related thing. Again, audio making it slow? The loader of an .h264 taking a long time. Changing viewports. Pretty much I have all the problems Jan Van Akkere mentions... Maybe you should write a proper bug report and hopefully Blackmagic will listen. Since you seem to be more verse in Fussion. I am just revisiting, and wildly hoping it improves....currently my office uses a layer base composition program and I can only wish so hard for a node alternative.

Hey Nicolas,
Just came across this post. I use a HP Z600 with a Quadro 4000 so a little less than yours. However, I fail to see any of the problems that you are talking about. At least I think I am looking at the same thing. I do not have nor use h.264 stuff for my work and I currently, as I type this, have a reasonable comp open and it is all very snappy to move around. The only one that takes a second is the saver, which is saving a QT DNxHD file for editorial to use. Maybe this is the same issue you are having? I will assume it is a QT issue, and how the loader and saver are written for QT. However, as I said, clicking through my comp is fast and instant. One thing I do notice and I hope is improved, is a DPX sequence of HD material from a PCI SSD drive, which can playback at 24fps on generation, will only give me at best 10 fps when you push the play button and it loads into mem. Obviously when loaded into mem it is fine. This is faster than my normal data drive, but I would expect this to give me much faster load times.
So I would think this is a QT issue with Fusion. Don't be put off by this, unless you use QT's all the time, then I will say yeah that is annoying. I would defiantly tell them about it. They do listen to what you write, and this version 8 seems to be having some QT love being put into it. So who knows?
Cheers