You can use com.waveset.server.InitAdminCacheThread to trace start-up timings. For example,
20091124 12:02:56.203 InitAdminCacheThread(0x010dae16) InitAdminCacheThread#initAdminCache() Info Getting 9 admins from admin cache took 0m0.266s 20091124 12:02:56.437 InitAdminCacheThread(0x010dae16) InitAdminCacheThread#initAdminCache() Info Loading auth cache for 9 admins took 0m0.234s