ZSH: Display commands runtime in prompt

Hi Shellers,

Development speed matters to many programmers, which is why I like to keep an eye on how long commands run:

If you use ZSH, paste this in your startup script, I put it in .zsh.after/prompt.zsh. It adds the run time of the last command in seconds to your right command prompt.

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
}

In case you don't use ZSH, see this script which emulates above functions in bash. You need to add a preexec_install after you define above functions.