This script types a long string without errors(!!!) for you. Delay between keystrokes is variable. Originally taken from http://christianheilmann.com/2014/01/09/autmating-typing-in-screencasts-with-applescript-or-how-to-look-like-a-hollywood-hacker/

screencast typing.scpt

set myLines to "Brainstorming is a group or individual creativity technique by which efforts are made to find a conclusion for a specific problem by gathering a list of ideas spontaneously contributed by its member(s). The term was popularized by Alex Faickney Osborn in the 1953 book Applied Imagination. Osborn claimed that brainstorming was more effective than individuals working alone in generating ideas, although more recent research has questioned this conclusion. Today, the term is used as a catch all for all group ideation sessions."
set recordedApp to "iOS Simulator"
set typingDelay to "0.1" --try 0.05 so something much faster (double, actually)

--make sure the recorded app is foreground
--otherwise it can result into missing strings
activate application recordedApp
delay 3

repeat with currentline in myLines
	write_string(currentline)
end repeat

on write_string(the_string)
	tell application "System Events"
		activate application recordedApp
		repeat with the_character in the_string
			keystroke the_character
			delay typingDelay
		end repeat
	end tell
end write_string