Cubase 8 and Spectrasonics Plug-Ins

Here my observations:

Performance problem with Spetrasonics Omnisphere, 1.58d (with sometimes cubase apphangB1) and 1.56d tested.
ASIO Guard on or off makes no difference (it’s a kind of sampler), audio samples 128, 256, 512 no change.

  1. Start Cubase 8.05
  2. Start a new empty project (ctrl-N → other → empty)
  3. Choose Track instrument: add Omnisphere as Track Instrument.
  4. Add a track then.
  5. Choose omnisphere library in the library browser for example.
  6. Load a patch, play a tone, should work now.
  7. Use the the patch down arrow in omnisphere to choose next patch (do this for some patches)

Compare this behaviour with former version 7.5.30. It’s a big difference! 7.5.30 is fast.
Step 4. takes 40 sec. on 8.05, 6 sec. on 7.5.30.!

Result: CubasePro 8.05 is very very very lazy. No fun to use omnisphere at all.
=>I can click on any button in omnisphere it takes ages. It is very unresponsive in general, it is extremely lazy,
in cubase and omnisphere meters stuck but still I can play notes. Strange.

If I do this with padshop instead of omnisphere, it’s working fine.
But what is the problem? Using a non Steinberg VST2 plugin??

I’ve compared the performance of some cubase versions (6.55, 7.5.30, 8.05) with DAW-Bench-VI, see:

and found out that on my machine C8.05 has the worst performance.
This DAW bench uses extensively NI KONTAKT (a VST 2.4 and a sampler too).

General: Compared in the same environment and using the same plugins:
Start of Cubase 8.05 takes ~52sec., 7.5.30 ~18sec.)
Closing of Cubase 8.05 takes ~20sec., 7.5.30 ~6sec.)

What can I say: I’m very disappointed at the moment.

Info: Cubase Pro 8.05-64 (I did the full 9.1GB installation) on Win7-64 and I have no SSD.