const {configure, getLogger, shutdown} = require('log4js');

configure({
  appenders: {
    everything: { type: 'file', filename: 'all-the-logs.log' }
  },
  categories: {
    default: { appenders: [ 'everything' ], level: 'debug' }
  }
});

const logger = getLogger();

let s = [];
for (let i = 0; i < 100; i++) {
  s.push("xxxx");
}
let s1 = s.join(",");

setTimeout(()=>{
  console.log("after setTimeout", process.memoryUsage().rss / Math.pow(1024, 2));
}, 10000)

for (let j = 0; j < 10; j++) {
  for (let i = 0; i < 10000; i++) {
    logger.debug(s1 + i);
  }
  console.log(process.memoryUsage().rss / Math.pow(1024, 2));
}
console.log("before shutdown", process.memoryUsage().rss / Math.pow(1024, 2));
shutdown(()=>{
  console.log("after shutdown", process.memoryUsage().rss / Math.pow(1024, 2));
})

41.60546875
53.203125
64.42578125
71.15234375
86.609375
102.85546875
110.1640625
117.4140625
124.35546875
131.5390625
before shutdown 131.5390625
after shutdown 134.94921875
after setTimeout 134.96875