After 23.7 release, you might see that Sample creation is taking longer, or that the performance has degraded.
We made a change to address some issues relating to the accurate bulk creation of Samples, especially when the Sample Template contains a lot of content. This has forced us to create Samples more sequentially than in parallel and has increased the time needed for Sample creation.
We will continue to look at ways to increase performance again, but for the time being this reduction in performance is necessary to address the underlying issue.