로그 파일에서 시간 간격 추출하기, https://agvim.wordpress.com/2018/05/08/generate-text-time-interval-from-log-file/

logtimer.js

#!/usr/bin/env node
const cli = require('cli'),
  moment = require('moment'),
  config = require('./config');

function getAndroidTimeStr(str) {
  const timeRe = /^\d\d-\d\d \d\d:\d\d:\d\d\.\d\d\d/;
  let resultStr = timeRe.exec(str);
  return resultStr === null ? "" : resultStr[0];
}

function getAndroidTimeDiff(prev_time, cur_time) {
  let cur_m_time,
    prev_m_time;
  prev_m_time = moment(prev_time, "MM-DD HH:mm:ss.SSS");
  cur_m_time = moment(cur_time, "MM-DD HH:mm:ss.SSS");
  return (cur_m_time.valueOf() - prev_m_time.valueOf());
}

let line_number = 0,
  cur_time,
  prev_time,
  start_time,
  re;

cli.withInput(function (line, newline, eof) {
  line_number = line_number + 1;
  if (!eof) {
    //console.log(line, "####", line_number);
    let i = 0,
      length = config.length;
    for(i = 0; i < length; i++) {
      let pattern = config[i].pattern,
        desc = config[i].description;
      re = new RegExp(pattern);
      if(line.match(re)) {
        cur_time = getAndroidTimeStr(line);
        if(prev_time === undefined) {
          prev_time = cur_time;
          start_time = cur_time;
        }
        console.log(getAndroidTimeDiff(start_time, cur_time) + "ms", "(~" + getAndroidTimeDiff(prev_time, cur_time) + "ms)", desc, "#", line_number);
        prev_time = cur_time;
      }
    }
  }
});