example-snapshot.js

var profiler = require('v8-profiler');

process.on('SIGUSR2', () => {
  const snapshot = profiler.takeSnapshot();
  const fileName = `/tmp/my-project-${Date.now()}.heapsnapshot`;
  snapshot.export()
    .pipe(fs.createWriteStream(fileName))
    .on('finish', () => {
      console.log(`snapshot ${fileName} has been stored`);
      snapshot.delete();
    });
});