electron-renderer-init.js

console.time('init')

// require() calls and early initialization
[...]

var state = State.getInitialState()

// `state.saved` is read from and written to a file. All other state is ephemeral. 
// First we load state.saved, once that is done, initialize the app.
loadState(init)

function init () {
  // Initialize your app
  // Set up event listeners
  // - Listen for IPC messages from the main process
  // - Listen for drag-drop events
  // - etc
  // Start your React or virtual-dom render loop
  // Create the DOM
  [...]

  // Done! Ideally we want to get here <100ms after the user clicks the app
  console.timeEnd('init')
}