One of the new capabilities in Lotus Notes 8.5 standard client to improve performance was a change in Authentication. Now starting from Version 8.5 the user is asked to authenticate, and only then Lotus Notes workbench appears. This authentication method can change user experience and might appear to improves performance of the client.
Lotus Notes default behavior is with enabled early authentication. There is a notes.ini parameter, that you may use to specify to use the old authentication method.
ENABLE_EARLY_AUTHENTICATION with Lotus Notes Standard client Startup process in Windows platform
Lotus Notes standard client process starting order
Notes.exe : Responsible for initialization of Notes process and service and will exit after dependent services initialization complete.
nlnotes.exe: Lotus Notes client process and it will launch user password prompt during initialization process.
notes2.exe: Lotus Notes standard client Java process implementation.
Do not change this parameter to 0, unless suggested by IBM Support. Some roaming features in Lotus Notes 8.5 may not work if you change the default value.