nornagon/index.html Secret

## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Remote vs Local Performance</title>
  </head>
  <body>
    <pre id="out">measuring...
</pre>
    <script>
      // You can also require other files to run in this process
      require('./renderer.js')
    </script>
  </body>
</html>

## main.js
// Modules to control application life and create native browser window
const {app, BrowserWindow} = require('electron')

global.obj = {
  property: ''
}

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow

function createWindow () {
  // Create the browser window.
  mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      nodeIntegration: true
    }
  })

  // and load the index.html of the app.
  mainWindow.loadFile('index.html')

  // Open the DevTools.
  // mainWindow.webContents.openDevTools()

  // Emitted when the window is closed.
  mainWindow.on('closed', function () {
    // Dereference the window object, usually you would store windows
    // in an array if your app supports multi windows, this is the time
    // when you should delete the corresponding element.
    mainWindow = null
  })
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', createWindow)

// Quit when all windows are closed.
app.on('window-all-closed', function () {
  // On OS X it is common for applications and their menu bar
  // to stay active until the user quits explicitly with Cmd + Q
  if (process.platform !== 'darwin') {
    app.quit()
  }
})

app.on('activate', function () {
  // On OS X it's common to re-create a window in the app when the
  // dock icon is clicked and there are no other windows open.
  if (mainWindow === null) {
    createWindow()
  }
})

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.

## renderer.js
// This file is required by the index.html file and will
// be executed in the renderer process for that window.
// All of the Node.js APIs are available in this process.
const remoteObj = require('electron').remote.getGlobal('obj')
const localObj = {
  property: '',
}

setTimeout(() => {

// warmup
for (let i = 0; i < 1000; i++) {
  remoteObj.property
  localObj.property
}

{
  const begin = performance.now()
  for (let i = 0; i < 10000; i++) {
    remoteObj.property
  }
  out.textContent += `remoteObj.property: ${((performance.now() - begin)/10000).toFixed(6)} ms\n`
}
{
  const begin = performance.now()
  for (let i = 0; i < 10000; i++) {
    localObj.property
  }
  out.textContent += `localObj.property: ${((performance.now() - begin)/10000).toFixed(6)} ms\n`
}

})
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<title>Remote vs Local Performance</title>
	</head>
	<body>
	<pre id="out">measuring...
	</pre>
	<script>
	// You can also require other files to run in this process
	require('./renderer.js')
	</script>
	</body>
	</html>
	// Modules to control application life and create native browser window
	const {app, BrowserWindow} = require('electron')

	global.obj = {
	property: ''
	}

	// Keep a global reference of the window object, if you don't, the window will
	// be closed automatically when the JavaScript object is garbage collected.
	let mainWindow

	function createWindow () {
	// Create the browser window.
	mainWindow = new BrowserWindow({
	width: 800,
	height: 600,
	webPreferences: {
	nodeIntegration: true
	}
	})

	// and load the index.html of the app.
	mainWindow.loadFile('index.html')

	// Open the DevTools.
	// mainWindow.webContents.openDevTools()

	// Emitted when the window is closed.
	mainWindow.on('closed', function () {
	// Dereference the window object, usually you would store windows
	// in an array if your app supports multi windows, this is the time
	// when you should delete the corresponding element.
	mainWindow = null
	})
	}

	// This method will be called when Electron has finished
	// initialization and is ready to create browser windows.
	// Some APIs can only be used after this event occurs.
	app.on('ready', createWindow)

	// Quit when all windows are closed.
	app.on('window-all-closed', function () {
	// On OS X it is common for applications and their menu bar
	// to stay active until the user quits explicitly with Cmd + Q
	if (process.platform !== 'darwin') {
	app.quit()
	}
	})

	app.on('activate', function () {
	// On OS X it's common to re-create a window in the app when the
	// dock icon is clicked and there are no other windows open.
	if (mainWindow === null) {
	createWindow()
	}
	})

	// In this file you can include the rest of your app's specific main process
	// code. You can also put them in separate files and require them here.
	// This file is required by the index.html file and will
	// be executed in the renderer process for that window.
	// All of the Node.js APIs are available in this process.
	const remoteObj = require('electron').remote.getGlobal('obj')
	const localObj = {
	property: '',
	}

	setTimeout(() => {

	// warmup
	for (let i = 0; i < 1000; i++) {
	remoteObj.property
	localObj.property
	}

	{
	const begin = performance.now()
	for (let i = 0; i < 10000; i++) {
	remoteObj.property
	}
	out.textContent += `remoteObj.property: ${((performance.now() - begin)/10000).toFixed(6)} ms\n`
	}
	{
	const begin = performance.now()
	for (let i = 0; i < 10000; i++) {
	localObj.property
	}
	out.textContent += `localObj.property: ${((performance.now() - begin)/10000).toFixed(6)} ms\n`
	}

	})