Variable: jit-lock-chunk-size
jit-lock-chunk-size is a customizable variable defined in
jit-lock.el.gz.
Value
1500
Documentation
Jit-lock asks to fontify chunks of at most this many characters at a time.
The actual size of the fontified chunk of text can be different,
depending on what the fontification-functions actually decide to do.
This variable controls both display-time and stealth fontifications.
The optimum value is a little over the typical number of buffer characters which fit in a typical window.
Source Code
;; Defined in /usr/src/emacs/lisp/jit-lock.el.gz
(defcustom jit-lock-chunk-size 1500
"Jit-lock asks to fontify chunks of at most this many characters at a time.
The actual size of the fontified chunk of text can be different,
depending on what the `fontification-functions' actually decide to do.
This variable controls both display-time and stealth fontifications.
The optimum value is a little over the typical number of buffer
characters which fit in a typical window."
:type 'natnum)