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 @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}
}

here is my idea of a simple prompt with random colors and also a slightly modified way of showing the numbers, having a 2 part place holder prompt when starting zsh and a 3 part prompt with elapsed time, also includes black and white part for error-ed out commands

had some help from here for making the random colors in the function part of the prompt work

PROMPT='%F{$(($RANDOM%6+1))}[%f%D{%H:%M}%F{$(($RANDOM%6+1))}] %F{$(($RANDOM%6+1))}[%f$(shrink_path -f)%F{$(($RANDOM%6+1))}]%f '

function preexec() {
  timer=$(date +%s%3N)
}

function precmd() {
  if [ $timer ]; then
    local now=$(date +%s%3N)
    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 elapsed=(${h}h ${m}m)
    elif ((m > 0)); then elapsed=(${m}m ${s}s)
    elif ((s >= 10)); then elapsed=${s}.$((ms / 100))s
    elif ((s > 0)); then elapsed=${s}.$((ms / 10))s
    else elapsed=${ms}ms
    fi

	psvar=("$(shrink_path -f)" "$elapsed" "[" "]")
	local ok="%F{$((RANDOM%6+1))}%3v%f%D{%H:%M}%F{$((RANDOM%6+1))}%4v %F{$((RANDOM%6+1))}%3v%f%1v%F{$((RANDOM%6+1))}%4v %F{$((RANDOM%6+1))}%3v%f%2v%F{$((RANDOM%6+1))}%4v%f "
	local err="%K{7}%F{0}%3v%D{%H:%M}%4v%k %K{7}%3v%1v%4v%k %K{7}%3v%2v%4v%k%f "
	PROMPT="%(?.$ok.$err)"

    unset timer
  fi
}

Shows execution time at the end of the prompt

OG_PROMPT=$PROMPT
function preexec() {
  timer=$(($(date +%s%0N)/1000000))
}

function precmd() {
  if [ $timer ]; then
    now=$(($(date +%s%0N)/1000000))
    elapsed=$(($now-$timer))

    export PROMPT="$OG_PROMPT%F{cyan}${elapsed}ms %{$reset_color%}> "
    unset timer
  fi
}