Elapsed and execution time for commands in ZSH

zsh-elapsed-time.md

Elapsed and execution time display for commands in ZSH

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
}

Remixed from @adri's snippet.

<3 @mezza

Is it possible to add this execution time at the rear of the first line like the style of Spaceship Prompt?

Dumb question but whats the math for getting this in seconds? Change 1000000 to 1000?

<3 @jututt

Dumb question but whats the math for getting this in seconds? Change 1000000 to 1000?

Here is the same snippet as above, but it displays as seconds with 3 decimals

function preexec() {
  timer=$(($(date +%s%0N)*0.000000001))
}

function precmd() {
  if [ $timer ]; then
    now=$(($(date +%s%0N)*0.000000001))
    elapsed=$(echo $(($now-$timer)) | awk '{printf "%.3f", $1}')

    export RPROMPT="%F{cyan}${elapsed}s %{$reset_color%}"
    unset timer
  fi
}

  cmd_start=$(($(print -P %D{%s%6.}) / 1000))

Why not simply use the following?

  cmd_start=$(print -P %D{%s%3.})

No need to ask for microsecs and then divide by 1000, if you can get millisecs directly...

I wanted slightly more accuracy, and the time on the left of the normal prompt, so I've changed the code of rafbm to this (works on macos 13):

myprompt="%B%F{cyan}%n@%m:%d/ %h%(!.#.>)%f%b"

function preexec() {
  timer=$(print -P %D{%s%3.})
}

function precmd() {
  timeprompt=""	
  if [ $timer ]; then
    now=$(print -P %D{%s%3.})
    local d_ms=$(($now - $timer))
    local d_s=$((d_ms / 1000))
    local ms=$((d_ms % 1000))
    local s=$((d_s % 60))
    local m=$(((d_s / 60) % 60))
    local h=$((d_s / 3600))

    if   ((h > 0)); then timeprompt=${h}h${m}m${s}s
    elif ((m > 0)); then timeprompt=${m}m${s}.$(printf $(($ms / 100)))s # 1m12.3s
    elif ((s > 9)); then timeprompt=${s}.$(printf %02d $(($ms / 10)))s # 12.34s
    elif ((s > 0)); then timeprompt=${s}.$(printf %03d $ms)s # 1.234s
    else timeprompt=${ms}ms
    fi
    timeprompt="%B%F{yellow}${timeprompt} %f%b"
    unset timer
  fi
  export PS1=${timeprompt}${myprompt}
}