St Emacs 256 colors
Emacs starts very slowly in st with default settings.
Put this in your init.el:
(defvar xterm-extra-capabilities nil)
(defvar xterm-query-timeout nil)
(add-to-list 'term-file-aliases
'("st-256color" . "xterm-256color"))
Details in /usr/share/emacs/27.1/lisp/term/xterm.el