Variable: search-slow-speed
search-slow-speed is a customizable variable defined in isearch.el.gz.
Value
1200
Documentation
Highest terminal speed at which to use "slow" style incremental search.
This is the style where a one-line window is created to show the line that the search has reached.
Source Code
;; Defined in /usr/src/emacs/lisp/isearch.el.gz
(defcustom search-slow-speed 1200
"Highest terminal speed at which to use \"slow\" style incremental search.
This is the style where a one-line window is created to show the line
that the search has reached."
:type 'integer)