Variable: fast-but-imprecise-scrolling

fast-but-imprecise-scrolling is a customizable variable defined in window.c.

Value

nil

Documentation

When non-nil, accelerate scrolling operations.

This comes into play when scrolling rapidly over previously unfontified buffer regions. Only those portions of the buffer which are actually going to be displayed get fontified.

Note that this optimization can cause the portion of the buffer displayed after a scrolling operation to be somewhat inaccurate.

This variable was added, or its default value changed, in Emacs 25.1.

View in manual

Probably introduced at or before Emacs version 25.1.

Source Code

// Defined in /usr/src/emacs/src/window.c
  DEFVAR_BOOL ("fast-but-imprecise-scrolling",
               fast_but_imprecise_scrolling,
               doc: /* When non-nil, accelerate scrolling operations.
This comes into play when scrolling rapidly over previously
unfontified buffer regions.  Only those portions of the buffer which
are actually going to be displayed get fontified.

Note that this optimization can cause the portion of the buffer
displayed after a scrolling operation to be somewhat inaccurate.  */);