An alleged Comet Lake desktop processor, the Intel Core i9-10900, has been put through its paces on both Cinebench R15 and Cinebench R20. The engineering sample (ES) posted some unimpressive multi-core results that won't challenge competitors such as the AMD Ryzen 9 3900X processor. However, it is likely that the final consumer variant of the Intel chip will offer better performance.
https://www.notebookcheck.net/Intel-Core-i9-10900-sample-s-pedestrian-results-on-Cinebench-R15-and-Cinebench-R20-won-t-trouble-AMD-s-Ryzen-9-3900X.454476.0.html