Is there a tool to diagnose slow application startup?

Have you also set the compiletime logging purge to a low level?

Do you experience that pause in prof and development or only in one of those?

Have you only altered dependencies under your direct control or foreign/third party ones as well?

Are you able to reproduce it with an empty stub project which forces a start of the deps and then just does nothing? If so, can you share this project or are there private dependencies? If it’s the latter can you reproduce the behaviour in a similar project that is stripped by the private deps? Can you share that one?

If you have such an empty project that does nothing but simulate your applications startup phase you can remove deps one at a time and experiment around in which combination the behaviour occurs, but Id prefer the logging you tried already since it’s usually much easier to debug those.