CODE EXAMPLE FOR TYPESCRIPT

mui icons slow compile time

//instead of

import {
  AppBar,
  Button,
  Hidden,
  IconButton,
  Toolbar,
} from '@material-ui/core';
import { Menu } from '@material-ui/icons';

//Do this:

import AppBar from '@material-ui/core/AppBar';
import Button from '@material-ui/core/Button';
import Hidden from '@material-ui/core/Hidden';
import IconButton from '@material-ui/core/IconButton';
import Toolbar from '@material-ui/core/Toolbar';
import Menu from '@material-ui/icons/Menu';