It depends on how much you've got loaded. Most serious emacs users have a vast corpus of elisp loading on boot. Nowadays, some people will load the elisp lazily

It depends on how much you've got loaded. Most serious emacs users have a vast corpus of elisp loading on boot. Nowadays, some people will load the elisp lazily, so the files are only evaluated of you use their functions. This is also why emacsclient exists: To try to amortize the startup cost.