separate event by the compositor)
	    flush	introduce a delay after each "flush" event.
	    nothrottle	Turn off throttling of the message grid. This is an
			optimization that joins many small scrolls to one
			larger scroll when drawing the message area (with
			'display' msgsep flag active).
	    invalid	Enable stricter checking (abort) of inconsistencies
			of the internal screen state. This is mostly
			useful when running nvim inside a debugger (and
			the test suite).
	    nodelta	Send all internally redrawn cells to the UI, even if
			they are unchanged from the already displayed state.

						*'redrawtime'* *'rdt'*
'redrawtime' 'rdt'	number	(default 2000)
			global
	Time in milliseconds for redrawing the display.  Applies to
	'hlsearch', 'inccommand', |:match| highlighting, syntax highlighting,
	and async |LanguageTree:parse()|.
	When redrawing takes more than this many milliseconds no further
	matches will be highlighted.
	For syntax highlighting the time applies per window.  When over the
	limit syntax highlighting is disabled until |CTRL-L| is used.
	This is used to avoid that Vim hangs when using a very complicated
	pattern.

						*'regexpengine'* *'re'*
'regexpengine' 're'	number	(default 0)
			global
	This selects the default regexp engine. |two-engines|
	The possible values are:
		0	automatic selection
		1	old engine
		2	NFA engine
	Note that when using the NFA engine and the pattern contains something
	that is not supported the pattern will not match.  This is only useful
	for debugging the regexp engine.
	Using automatic selection enables Vim to switch the engine, if the
	default engine becomes too costly.  E.g., when the NFA engine uses too
	many states.  This should prevent Vim from hanging on a combination of
	a complex pattern with long text.

		*'relativenumber'* *'rnu'* *'norelativenumber'* *'nornu'*
'relativenumber' 'rnu'	boolean	(default off)
			local to window
	Show the line number relative to the line with the cursor in front of
	each line. Relative line numbers help you use the |count| you can
	precede some vertical motion commands (e.g. j k + -) with, without
	having to calculate it yourself. Especially useful in combination with
	other commands (e.g. y d c < > gq gw =).
	When the 'n' option is excluded from 'cpoptions' a wrapped
	line will not use the column of line numbers.
	The 'numberwidth' option can be used to set the room used for the line
	number.
	When a long, wrapped line doesn't start with the first character, '-'
	characters are put before the number.
	See |hl-LineNr|  and |hl-CursorLineNr| for the highlighting used for
	the number.

	The number in front of the cursor line also depends on the value of
	'number', see |number_relativenumber| for all combinations of the two
	options.

							*'report'*
'report'		number	(default 2)
			global
	Threshold for reporting number of lines changed.  When the number of
	changed lines is more than 'report' a message will be given for most
	":" commands.  If you want it always, set 'report' to 0.
	For the ":substitute" command the number of substitutions is used
	instead of the number of lines.

				*'revins'* *'ri'* *'norevins'* *'nori'*
'revins' 'ri'		boolean	(default off)
			global
	Inserting characters in Insert mode will work backwards.  See "typing
	backwards" |ins-reverse|.  This option can be toggled with the CTRL-_
	command in Insert mode, when 'allowrevins' is set.

				*'rightleft'* *'rl'* *'norightleft'* *'norl'*
'rightleft' 'rl'	boolean	(default off)
			local to window
	When on, display orientation becomes right-to-left, i.e., characters
	that are stored in the file appear from the right to the left.
	Using this option, it is possible to edit files for languages that
	are written from the right to the left such as Hebrew and Arabic.
	This option is per window, so it is possible to edit mixed files
	simultaneously, or to view the same file in both ways (this is
	useful whenever you have a mixed text file with both right-to-left
	and left-to-right