Jeff McAffer, https://bugs.eclipse.org/bugs/show_bug.cgi?id=166011:
There are tools and facilities available to better understand the startup sequence. See Download Core Tools Using the core tools you can see exactly what causes each bundle to be started, you can find out what causes each class to be loaded, etc etc.
Consists of three .jar files,
To enable need to run eclipse with -debug <option file path> The Nov 2006 .options file CoreToolsOptionsExampleFile
After enable you have new views under Window->ShowView: File:ShowViewRuntimeTools.png
Perspectives -> Metadata. Then right click on Metadata Spy and navigate to your .metadata directory. This is a subdirectory of the workspace for me.