Very slow geometry phase 10x slower than old pc

[TomG]

News or findings will show up in a daily build as a "we hope this fixes...." ;) Or if something comes up where we'd appreciate a test "if you disable this in the BIOS..." or similar. So that is when it all becomes relevant for folks to test things - up until then while we are testing internally, there won't be any news.

[gmh_2001]

There seems to be a pattern here with high core/thread machines -see my threadripper post. My cinnebench scores were great on a 64 core machine and disappointing real world performance with corona 11...

[TomG]

Yep, we are aware of the patterns - I say patterns as we do know there is more than one thing going on.

[Byteman3D]

This is a frustrating but expected result, as @Pokoy stated, the more cores a system has, the slower single threaded operations will be.

I vaguely remember an old CPU single performance chart from Tom's Hardware website.

With a list of many high end products starting from 1 core 1 thread Pentium 4 3gHz, this CPU was the slowest of all processors in multicore benchmark and number fastest in single threaded.

I also experience this a lot and makes me feel pessimistic about our profession. That's why I work with my 4 Cores laptop until it is rendering time. It is definitely more responsive during viewport operations than the 24 Core Xeon one.