node parse-logs.js file-di-log.txt > parsed.csv

parse-logs.js

var path = process.argv[2];

console.log(`reading file ${path}`)
console.log(`Date, Memory`)

var lineReader = require('readline').createInterface({
    input: require('fs').createReadStream(path)
  });
    
var regexp = /(\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}).*Memory : (\d*)MB/g;
  
lineReader.on('line', function (line) {
    //console.log('Line from file:', line);
    m = regexp.exec(line)
    if(m)
    {
        console.log(`${new Date(m[1])} , ${m[2]}`);
    }
});