# Append this to your ~/.zshrc file.

function preexec() {

  timer=$(($(date +%s%0N)/1000000))

}

​

function precmd() {

  if [ $timer ]; then

    now=$(($(date +%s%0N)/1000000))

    elapsed=$(($now-$timer))

​

    export RPROMPT="%F{cyan}${elapsed}ms %{$reset_color%}"

    unset timer

  fi

}