Return a Float that represents the time value of {time}. Example: let start = reltime() call MyFunction() let seconds = reltimefloat(reltime(start)) See the note of reltimestr() about overhead. Also see |profiling|. If there is an error 0.0 is returned in legacy script, in Vim9 script an error is given. Can also be used as a |method|: reltime(start)->reltimefloat() {only available when compiled with the |+reltime| feature}