A script to show how long a command took to run. Outputs the time on the right.

command-time.sh

    function preexec() {
    	timer=${timer:-$SECONDS}
    }
     
    function precmd() {
    	if [ $timer ]; then
    	timer_show=$(($SECONDS - $timer))
    	export RPROMPT="%F{cyan}${timer_show}s %{$reset_color%}"
     	unset timer
     	fi
    }