gistfile1.sh

if type growlnotify > /dev/null 2>&1
then
  GROWL_REPORTTIME=5
  COMMAND=
  COMMAND_START_TIME=0
  function reset_command_start_time {
    COMMAND="${1}"
    COMMAND_START_TIME=`date +%s`
    echo $COMMAND
  }
  function notify_heavy_job_finished_on_growl {
    if (( COMMAND_START_TIME > 0 )); then
      local t=`date +%s`
      if (( t - COMMAND_START_TIME > GROWL_REPORTTIME )); then
        COMMAND="$COMMAND "
        growlnotify -t "${${(s: :)COMMAND}[1]}" -m "$COMMAND"
      fi
    fi
    COMMAND=
    COMMAND_START_TIME=0
  }
  add-zsh-hook preexec reset_command_start_time
  add-zsh-hook precmd notify_heavy_job_finished_on_growl
fi