emacs -Q
M-x byte-compile-file <RET> ~/.emacs.d/init.el <RET>

C-x C-c
emacs

;;; init.el is now native-compiled

C-h v user-init-file <RET>

;;; => "d:/mypath/Home/.emacs.d/init.el"

C-x C-c

emacs

C-h v user-init-file <RET>

;;; => "d:/mypath/Home/.emacs.d/native/29.0.50-a4a10996/init-7890dda9-d677a456.eln"