Cubase 12.0.30 performance issues

[Tj99]

Since there is no 12.0.40 performance issue topic and this issue was already there on 12.0.30 and now on .40, but was fine in C11:

There is an issue, which brings the CPU to its max when using mixdown and on top of that slows it down by at least 50%.

The same project on C11 exports fast and is light on the CPU during mixdown.

100% CPU Usage when mixdown

I tested it on my end here, and there is indeed an issue. The mixdown is about half the speed on C12 compared to C11 on top of that the CPU usage is maxed out as well, in C11 it was way lower. I tested it on a project I am working on at the moment On C11 it takes about 3 mins to export and CPU usage is around 35% On C12 it takes nearly 6 mins to export and CPU usage is around 100% on all cores. This is a serious isse: C11 [Export C11] C12 [Export C12]

Cubase 12 export is very slow

Same problem here. I7 12700 48Gb RAM m2 SSD. Very large project, but with cubase 11 export time was 2 minutes and now is 7, and CPU is used 100%. Maybe it’s some kind of zero-day bug?