I upgraded from Cubase 6 to Cubase 8 and decided to do a performance test. I created an instance of Diva playing a 12 voice synth patch on some recorded midi, then duplicated the instrument channel many times over to test how many I could run before the Asio meter blows up.
In Cubase 6 I was always able to run at least 20 instances of Diva with this patch without issues. In Cubase 8, 4 instances of this normal patch bring my computer to its knees.
Any ideas what the issue could be? At first I thought it was Cubase but then I performed a similar test with many other VSTs and had no problem. I can run 50 instances of NI Massive for example.
Here are my specs for both tests:
Windows 7 64 bit
Cubase 6: 32 bit running Diva 32 bit
Cubase 8: 64 bit running Diva 64 bit
Sound Interface: Fireface 400.
Buffer Size: 256 samples.
Input latency shows as 6.82
Output latencys shows as 7.98