{only available when compiled with the |+reltime| feature} The time in milliseconds for redrawing the display. This applies to searching for patterns for 'hlsearch', |:match| highlighting and syntax highlighting. 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.