#!/usr/bin/env zsh

typeset -a lines
typeset -i prev_time=0
typeset prev_command

while read line; do
    if [[ $line =~ '^.*\+([0-9]{10})\.([0-9]{6})[0-9]* (.+)' ]]; then
        integer this_time=$match[1]$match[2]

        if [[ $prev_time -gt 0 ]]; then
            time_difference=$(( $this_time - $prev_time ))
            lines+="$time_difference $prev_command"
        fi

        prev_time=$this_time

        local this_command=$match[3]
        if [[ ${#this_command} -le 80 ]]; then
            prev_command=$this_command
        else
            prev_command="${this_command:0:180}..."
        fi
    fi
done < ${1:-/dev/stdin}

print -l ${(@On)lines}